Pierson, R. H. (1966). The final countdown by Robert H Pierson and G S Stevenson. Pacific Press.
Cita Chicago (17th ed.)Pierson, Roberto H. The Final Countdown by Robert H Pierson and G S Stevenson. Pacific Press, 1966.
Cita MLA (9th ed.)Pierson, Roberto H. The Final Countdown by Robert H Pierson and G S Stevenson. Pacific Press, 1966.
Atenció: Aquestes cites poden no estar 100% correctes.