APA (7th ed.) Citation

Marcus, R. B. (1993). Modalities: Philosophical essays. Oxford Univ. Press.

Chicago Style (17th ed.) Citation

Marcus, Ruth Barcan. Modalities: Philosophical Essays. New York u.a: Oxford Univ. Press, 1993.

MLA (9th ed.) Citation

Marcus, Ruth Barcan. Modalities: Philosophical Essays. Oxford Univ. Press, 1993.