APA Citatie

 Alexander, I. (2009).  Discovering requirements: How to specify products and services.  John Wiley and Sons, Ltd., Publication.

Chicago Style citaat

 Alexander, Ian.  Discovering Requirements: How to Specify Products and Services.  John Wiley and Sons, Ltd., Publication, 2009.

MLA citatie

 Alexander, Ian.  Discovering Requirements: How to Specify Products and Services.  John Wiley and Sons, Ltd., Publication, 2009.

Let op: Deze citaties zijn niet altijd 100% accuraat.