Cita APA (7a ed.)

O'Brien, K. (1967). The Belief of Catholics: The Catholic enquiry centre course of booklets. The Catholic Enquiry Centre.

Cita Chicago Style (17a ed.)

O'Brien, Kevin. The Belief of Catholics: The Catholic Enquiry Centre Course of Booklets. London: The Catholic Enquiry Centre, 1967.

Cita MLA (9a ed.)

O'Brien, Kevin. The Belief of Catholics: The Catholic Enquiry Centre Course of Booklets. The Catholic Enquiry Centre, 1967.