APA aipamena

Birdsall, S. S., & Florin, J. (1992). Outline of American Geography. New York: John Wiley & Sons.

Chicago Style aipamena

Birdsall, Stephen S., và John Florin. Outline of American Geography. New York: John Wiley & Sons, 1992.

MLA aipamena

Birdsall, Stephen S., và John Florin. Outline of American Geography. New York: John Wiley & Sons, 1992.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.