APA (7th ed.) Citation

Newman, J. H. (1974). An essay on the development of Christian doctrine (The ed. of 1845.). Penguin Books.

Chicago Style (17th ed.) Citation

Newman, John Henry. An Essay on the Development of Christian Doctrine. The ed. of 1845. [Harmondsworth, Baltimore]: Penguin Books, 1974.

MLA (8th ed.) Citation

Newman, John Henry. An Essay on the Development of Christian Doctrine. The ed. of 1845. Penguin Books, 1974.