Hilgard, E. R., & Bower, G. H. (1956). Theories of learning (2nd ed.). Appleton-Century-Crofts.
Chicago-čujuhus (17. p.)Hilgard, Ernest R., juo Gordon H. Bower. Theories of Learning. 2nd ed. New York: Appleton-Century-Crofts, 1956.
MLA-čujuhus (9. p.)Hilgard, Ernest R., juo Gordon H. Bower. Theories of Learning. 2nd ed. Appleton-Century-Crofts, 1956.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.