Mager, R. F. (1972). Goal analysis. Fearon Publishers.
Lua i Stíl Chicago (17ú heag.)Mager, Robert Frank. Goal Analysis. Belmont, Calif.: Fearon Publishers, 1972.
Lua MLA (8ú heag.)Mager, Robert Frank. Goal Analysis. Fearon Publishers, 1972.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.