APA-viite (7. p.)

Hay, D. C. (2003). Requirements analysis: From business views to Architecture (1a. ed.). Pearson Education.

Chicago-viite (17. p.)

Hay, David C. Requirements Analysis: From Business Views to Architecture. 1a. ed. Upper Saddle River: Pearson Education, 2003.

MLA-viite (9. p.)

Hay, David C. Requirements Analysis: From Business Views to Architecture. 1a. ed. Pearson Education, 2003.