APA (7th ed.) Zitazioa

Harlow, W. M. (1957). Trees of the eastern and central United States and Canada. Dover.

Chicago Style (17th ed.) Zitazioa

Harlow, William M. Trees of the Eastern and Central United States and Canada. Nueva York: Dover, 1957.

MLA (9th ed.) Zitazioa

Harlow, William M. Trees of the Eastern and Central United States and Canada. Dover, 1957.