Cita APA (7th ed.)

Heinlein, R. A. (1983). Friday. Ballantine Books.

Cita Chicago (17th ed.)

Heinlein, Robert Anson. Friday. New York: Ballantine Books, 1983.

Cita MLA (9th ed.)

Heinlein, Robert Anson. Friday. Ballantine Books, 1983.