Hilgard, E. R., & Bower, G. H. (1975). Theories of learning (Fourth edition.). Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Hilgard, Ernest R., agus Gordon H. Bower. Theories of Learning. Fourth edition. Englewood Cliffs, New Jersey: Prentice-Hall, 1975.
Lua MLA (9ú heag.)Hilgard, Ernest R., agus Gordon H. Bower. Theories of Learning. Fourth edition. Prentice-Hall, 1975.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.