Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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