Alexander, I. (2009). Discovering requirements: How to specify products and services. John Wiley and Sons, Ltd., Publication.
استشهاد بنمط شيكاغوAlexander, Ian. Discovering Requirements: How to Specify Products and Services. John Wiley and Sons, Ltd., Publication, 2009.
MLA استشهادAlexander, Ian. Discovering Requirements: How to Specify Products and Services. John Wiley and Sons, Ltd., Publication, 2009.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.