APA (7th ed.) Citation

Allen, R. E. (1965). Studies in Plato's metaphysics. Humanities Press.

Chicago Style (17th ed.) Citation

Allen, Reginald E. Studies in Plato's Metaphysics. New York: Humanities Press, 1965.

MLA (9th ed.) Citation

Allen, Reginald E. Studies in Plato's Metaphysics. Humanities Press, 1965.