APA (7th ed.) Citation

Malory, T., Cowen, J., & Lawlor, J. (1969). Le morte d'Arthur. Penguin Books.

Chicago Style (17th ed.) Citation

Malory, Thomas, Janet Cowen, and John Lawlor. Le Morte D'Arthur. Baltimore: Penguin Books, 1969.

MLA (9th ed.) Citation

Malory, Thomas, et al. Le Morte D'Arthur. Penguin Books, 1969.