Παραπομπή APA

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

Παραπομπή Chicago Style

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

Παραπομπή MLA

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