APA (7th ed.) Citation

Beny, R., & Gunn, P. (1981). The churches of Rome. Simon and Schuster.

Chicago Style (17th ed.) Citation

Beny, Roloff, and Peter Gunn. The Churches of Rome. New York: Simon and Schuster, 1981.

MLA (9th ed.) Citation

Beny, Roloff, and Peter Gunn. The Churches of Rome. Simon and Schuster, 1981.