Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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