APA

Wolfe P., Scott C. & Erwin M. (2004). Anti-spam tool kit. New York: McGraw-Hill/Osborne.

Chicago

Wolfe Paul, Scott Charlie and Erwin Mike. 2004. Anti-spam tool kit. New York: McGraw-Hill/Osborne.

Harvard

Wolfe P., Scott C. and Erwin M. (2004). Anti-spam tool kit. New York: McGraw-Hill/Osborne.

MLA

Wolfe Paul, Scott Charlie and Erwin Mike. Anti-spam tool kit. New York: McGraw-Hill/Osborne. 2004.