Bittner, K., & Spence, I. (2003). Use case modeling. Addison Wesley ; Pearson Education.
Lua i Stíl Chicago (17ú heag.)Bittner, Kurt, agus Ian Spence. Use Case Modeling. Boston, MA : New Delhi: Addison Wesley ; Pearson Education, 2003.
Lua MLA (8ú heag.)Bittner, Kurt, agus Ian Spence. Use Case Modeling. Addison Wesley ; Pearson Education, 2003.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.