APA (7th ed.) Citation

Lewis, B. (1967). The Assassins: A radical sect in Islam. Weidenfeld and Nicolson.

Chicago Style (17th ed.) Citation

Lewis, Bernard. The Assassins: A Radical Sect in Islam. London: Weidenfeld and Nicolson, 1967.

MLA (9th ed.) Citation

Lewis, Bernard. The Assassins: A Radical Sect in Islam. Weidenfeld and Nicolson, 1967.

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