Cita APA (7th ed.)

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.