Gaya APA

Ruggiero, V, R. (1995). The art of thingking : a guide critical and creative thought (Ed. 4). New York: Harper Collin College Publishers.

Gaya MLA

Ruggiero, Vincent, Ryan. "The art of thingking : a guide critical and creative thought". Ed. 4 New York: Harper Collin College Publishers, 1995. Text.