APA (7th ed.) Citation

Ludlum, R. (1989). The Gemini Contenders. Bantam Books.

Chicago Style (17th ed.) Citation

Ludlum, Robert. The Gemini Contenders. New York: Bantam Books, 1989.

MLA (8th ed.) Citation

Ludlum, Robert. The Gemini Contenders. Bantam Books, 1989.

Warning: These citations may not always be 100% accurate.