APA-viite (7. p.)

Wiegers, K. E. (2003). Software requirements: Practical techniques for gathering and managing requirements throughout the product development cycle (2nd ed.). Microsoft Press.

Chicago-viite (17. p.)

Wiegers, Karl E. Software Requirements: Practical Techniques for Gathering and Managing Requirements Throughout the Product Development Cycle. 2nd ed. Redmond, WA: Microsoft Press, 2003.

MLA-viite (8. p.)

Wiegers, Karl E. Software Requirements: Practical Techniques for Gathering and Managing Requirements Throughout the Product Development Cycle. 2nd ed. Microsoft Press, 2003.