Leffingwell, D., & Widrig, D. (2011). Managing Software Requirements: A Use Case Approach, Second Edition. Addison Wesley.
استشهاد بنمط شيكاغوLeffingwell, Dean, و Don Widrig. Managing Software Requirements: A Use Case Approach, Second Edition. Addison Wesley, 2011.
MLA استشهادLeffingwell, Dean, و Don Widrig. Managing Software Requirements: A Use Case Approach, Second Edition. Addison Wesley, 2011.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.