Cartwright, W. H. (1950). The teaching of history in the United States (a. ed.). Instituto Panamericano de Geografía e Historia.
Lua i Stíl Chicago (17ú heag.)Cartwright, William H. The Teaching of History in the United States. a. ed. México: Instituto Panamericano de Geografía e Historia, 1950.
Lua MLA (9ú heag.)Cartwright, William H. The Teaching of History in the United States. a. ed. Instituto Panamericano de Geografía e Historia, 1950.
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