Lua APA (7ú heag.)

Gregory, W. M., & Guitteau, W. B. (1922). History and geography of Ohio. Ginn.

Lua i Stíl Chicago (17ú heag.)

Gregory, William M., agus William Backus Guitteau. History and Geography of Ohio. Boston: Ginn, 1922.

Lua MLA (8ú heag.)

Gregory, William M., agus William Backus Guitteau. History and Geography of Ohio. Ginn, 1922.

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