Gaya APA

Purvis, S, C. (2011). Whichad pulled best? 20 case histories on how to write and design ads that work (10th ed.). New York: Mc. Gravo Hill.

Gaya MLA

Purvis, Scott, C.. "Whichad pulled best? 20 case histories on how to write and design ads that work". 10th ed. New York: Mc. Gravo Hill, 2011. Text.