Hilgard, E. R. (1956). Theories of learning (2nd ed.). Appleton-Century-Crofts.
芝加哥风格引文Hilgard, Ernest R. Theories of Learning. 2nd ed. New York: Appleton-Century-Crofts, 1956.
MLA引文Hilgard, Ernest R. Theories of Learning. 2nd ed. Appleton-Century-Crofts, 1956.
警告：这些引文格式不一定是100％准确.