APA (7th ed.) Citation

Letarouilly, P. M., Simil, A., & Richardson, A. E. (1963). The Vatican and the Basilica of St. Peter, Rome. Alec Tiranti.

Chicago Style (17th ed.) Citation

Letarouilly, Paul Marie, Alphonse Simil, and Albert Edward Richardson. The Vatican and the Basilica of St. Peter, Rome. London: Alec Tiranti, 1963.

MLA (9th ed.) Citation

Letarouilly, Paul Marie, et al. The Vatican and the Basilica of St. Peter, Rome. Alec Tiranti, 1963.