Cita APA (7a ed.)

Newman, J. H. (1974). An essay on the development of Christian doctrine. Penguin.

Cita Chicago Style (17a ed.)

Newman, John Henry. An Essay on the Development of Christian Doctrine. England: Penguin, 1974.

Cita MLA (9a ed.)

Newman, John Henry. An Essay on the Development of Christian Doctrine. Penguin, 1974.