APA (7th ed.) Citation

Dalli Regoli, G., Gioseffi, D., Mellini, G. L., & Salvini, R. (1969). Vatican museums, Rome. Hamlyn.

Chicago Style (17th ed.) Citation

Dalli Regoli, Gigetta, Decio Gioseffi, Gian Lorenzo Mellini, and Roberto Salvini. Vatican Museums, Rome. London: Hamlyn, 1969.

MLA (9th ed.) Citation

Dalli Regoli, Gigetta, et al. Vatican Museums, Rome. Hamlyn, 1969.