Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (8th ed.)

Martin, Gottfried. General Metaphysics: Its Problems and Its Method. Allen & Unwin, 1968.