Whenever you use information in a report from other sources it is compulsory to cite the original source in the text and reference the source in your reference list at the end of a report. It is not allowed to use information from somebody else as being your own information.

What should be referenced?

  • Quotations, summaries, paraphrases
  • Facts from references
  • Distinctive or authoritative ideas

Why do you need to reference sources?

  • Plagiarism is not allowed in sciences
  • Allow reader to check original sources
  • Justification for statements
  • Safeguard against mistakes made by the other author

Criteria for referencing: the 3 C’s:

  • Clear - must give full details of the item
  • Consistent - cite in the same way
  • Correct - use the proper structure

Examples of Reference APA style

Article in a journal

Author(s). Year of publication, 'Article title', Journal Title, volume, issue, range of article pages. DOI:


Schulze, E. D. (2014). Large-scale biogeochemical research with particular reference to forest ecosystems, an overview. Forest Ecology and Management316, 3–8.

Vintrou, E., Desbrosse, A., Bégué, A., Traoré, S., Baron, C., & Lo Seen, D. (2012). Crop area mapping in West Africa using landscape stratification of MODIS time series and comparison with existing global land products. International Journal of Applied Earth Observation and Geoinformation14(1), 83–93.


Author(s). Year of publication, Book Title, Place of publication: Publisher.

- Single author:

Huchzermeyer, M. (2011). Cities with Slums : From Informal Settlement Eradication to a Right to the City in Africa. Chicago: Juta Academic.

- Multiple authors:

Elachi, C., & Zyl, J. J. (2011). Introduction to the physics and techniques of remote sensing (Vol. 41). New York : Wiley.

- Edited work:

Weng, Q. (Ed.). (2011). Advances in environmental remote sensing : sensors, algorithms, and applications. Boca Raton : CRC Press.

Chapter or article in an edited book

Author(s) of chapter. Year of publication, 'Chapter title', in Book Title, ed(s). Editor(s) of book,  Place of publication, Publisher, chapter, (pages). DOI


Kar, D. (2013). The Limnology of Lentic System. In Wetlands and Lakes of the World (pp. 27–31). New Delhi: Springer India.

Conference paper

Author(s) (Year of publication). Title of Paper or Proceedings, Title of Conference, Location, Date. Place of publication: Publisher.


Cloyd, AM. (2014). Surveying students: A look at citation habits of college students, presented at EasyBib Info Lit Conference, New York City, 2014. New York, NY: EasyBib Publishing.

MSc thesis 

Author. (Year of publication), Thesis Title (MSc thesis), Place of publication: Publisher


Ali, H. T. (2016). Digital urban terrain characterization for 1D2D hydrodynamic flood modelling in Kigali, Rwanda (MSc thesis). Enschede: University of Twente Faculty of Geo-Information and Earth Observation (ITC).


Author/editor. (Last update or copyright date), Title. Retrieved from -date of acces : <URL>


The World Bank. (2012). KEI and KI Indexes. Retrieved May 23, 2014, from

Norm or Patent 

Author/editor. (Last update or copyright date), Title. Place of publication, Publisher


ISO. (2012). NEN-EN-ISO 19152 : 2012 Geographic information : Land Administration Domain Model (LADM) ((ISO 19152.). Delft: International Standardization Organization (ISO), Nederlands Normalisatie Instituut (NEN).