Cita APA (7th ed.)
Little, P., & Foreward by Graham Billy. (1988). The answer to life. Crossway Books.
Cita Chicago (17th ed.)
Little, Paul, i Foreward by Graham Billy. The Answer to Life. Illinois: Crossway Books, 1988.
Cita MLA (9th ed.)
Little, Paul, i Foreward by Graham Billy. The Answer to Life. Crossway Books, 1988.
Atenció: Aquestes cites poden no estar 100% correctes.