Gaya APA

Ashton, F, M, ,., J.Monaco, T. (1991). Weed Science : Principles And Practices (Edisi 3). New York: John Willey and Sons.

Gaya MLA

Ashton, Floyd, M., ,., J.Monaco, Thomas. "Weed Science : Principles And Practices". Edisi 3 New York: John Willey and Sons, 1991. .