APA aipamena

Leffingwell, D., & Widrig, D. (2011). Managing Software Requirements: A Use Case Approach, Second Edition. Addison Wesley.

Chicago Style aipamena

Leffingwell, Dean, và Don Widrig. Managing Software Requirements: A Use Case Approach, Second Edition. Addison Wesley, 2011.

MLA aipamena

Leffingwell, Dean, và Don Widrig. Managing Software Requirements: A Use Case Approach, Second Edition. Addison Wesley, 2011.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.