Gaya APA

Harlow, W, M. (1991). Textbook of dendrology : covering the important forest trees of the United States and Canada (7th ed). New York: McGraw Hill.

Gaya MLA

Harlow, William, M.. "Textbook of dendrology : covering the important forest trees of the United States and Canada". 7th ed New York: McGraw Hill, 1991. Text.