Gaya APA

Floyd, M, A., Lyman, J, N. (1982). Weed Science : Principles and Practices (2nd). Canada: John Wiley and Sons, Inc.

Gaya MLA

Floyd, M., Ashton,., Lyman, J., Noordhoff,. "Weed Science : Principles and Practices". 2nd Canada: John Wiley and Sons, Inc, 1982. Text.