APA (7th ed.) Citation

Allen, R. E. (1965). Studies in Plato's metaphysics. Routledge & Kegan Paul.

Chicago Style (17th ed.) Citation

Allen, Reginald E. Studies in Plato's Metaphysics. London: Routledge & Kegan Paul, 1965.

MLA (9th ed.) Citation

Allen, Reginald E. Studies in Plato's Metaphysics. Routledge & Kegan Paul, 1965.