Howden, W. E. (1987). Functional program testing and analysis. National Book Store.
Lua i Stíl Chicago (17ú heag.)Howden, William E. Functional Program Testing and Analysis. Manila: National Book Store, 1987.
Lua MLA (9ú heag.)Howden, William E. Functional Program Testing and Analysis. National Book Store, 1987.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.