Cita APA (7th ed.)
Ryrie, C. C. (1982). The final countdown. Victor Books.
Cita Chicago (17th ed.)
Ryrie, Charles C. The Final Countdown. Illinois: Victor Books, 1982.
Cita MLA (9th ed.)
Ryrie, Charles C. The Final Countdown. Victor Books, 1982.
Atenció: Aquestes cites poden no estar 100% correctes.