HOWDEN, W. E. (1987). Functional Program Testing And Analysis William E. Howden. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)HOWDEN, William E. Functional Program Testing And Analysis William E. Howden. McGraw-Hill, 1987.
Lua MLA (8ú heag.)HOWDEN, William E. Functional Program Testing And Analysis William E. Howden. McGraw-Hill, 1987.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.