Anderson, P. (1977). The trouble twisters. Berkley Publishing Corporation.
Cita Chicago (17th ed.)Anderson, Poul. The Trouble Twisters. New York: Berkley Publishing Corporation, 1977.
Cita MLA (9th ed.)Anderson, Poul. The Trouble Twisters. Berkley Publishing Corporation, 1977.
Atenció: Aquestes cites poden no estar 100% correctes.