APA (7th ed.) Citation

Voltaire & Edwards, P. (1989). Voltaire selections. Macmillan.

Chicago Style (17th ed.) Citation

Voltaire and Paul Edwards. Voltaire Selections. New York: Macmillan, 1989.

MLA (9th ed.) Citation

Voltaire and Paul Edwards. Voltaire Selections. Macmillan, 1989.