Gaya APA

Class president. (1990). New York: [s.n.].

Gaya Chicago

Class president. Cet.1. New York: [s.n.], 1990. Text.

Gaya MLA

Class president. Cet.1. New York: [s.n.], 1990. Text.

Gaya Turabian

Class president. New York: [s.n.], 1990. Print.