APA aipamena

(1978). America's heritage in the twentieth century. Saint Louis, Missouri: Forum Press.

Chicago Style aipamena

America's Heritage in the Twentieth Century. Saint Louis, Missouri: Forum Press, 1978.

MLA aipamena

America's Heritage in the Twentieth Century. Saint Louis, Missouri: Forum Press, 1978.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.