Gehring, A. (1908). Racial contrasts: Distinguishing traits of the Graeco-Latins and Teutons. G. P. Putnam's sons.
Lua i Stíl Chicago (17ú heag.)Gehring, Albert. Racial Contrasts: Distinguishing Traits of the Graeco-Latins and Teutons. New York and London: G. P. Putnam's sons, 1908.
Lua MLA (8ú heag.)Gehring, Albert. Racial Contrasts: Distinguishing Traits of the Graeco-Latins and Teutons. G. P. Putnam's sons, 1908.
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