APA (7th ed.) Citation

Martin, G., & O'Connor, D. (1968). General metaphysics: Its problems and its method. Allen & Unwin.

Chicago Style (17th ed.) Citation

Martin, Gottfried, and Daniel O'Connor. General Metaphysics: Its Problems and Its Method. London: Allen & Unwin, 1968.

MLA (9th ed.) Citation

Martin, Gottfried, and Daniel O'Connor. General Metaphysics: Its Problems and Its Method. Allen & Unwin, 1968.