APA (7th ed.) Citation

Lewis, B. (1968). The Assassins: A radical sect in Islam. Basic Books.

Chicago Style (17th ed.) Citation

Lewis, Bernard. The Assassins: A Radical Sect in Islam. New York: Basic Books, 1968.

MLA (8th ed.) Citation

Lewis, Bernard. The Assassins: A Radical Sect in Islam. Basic Books, 1968.

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