Gaya APA
Peregoy, R, S. (1991).
Weed Socience Vol.38 No. 2-5 July - September 1990 .
Madison, Wisconsin, AS:
Weed science Society of america.
Gaya MLA
Peregoy, Robert, S..
"Weed Socience Vol.38 No. 2-5 July - September 1990".
Madison, Wisconsin, AS:
Weed science Society of america,
1991.
Text.