APA (7th ed.) Citation

Maccarrone, M., Zerbi, P., Volpini, R., & Galuzzi, A. (1991). Romana Ecclesia, Cathedra Petri: I. Herder.

Chicago Style (17th ed.) Citation

Maccarrone, Michele, Piero Zerbi, Raffaello Volpini, and Alessandro Galuzzi. Romana Ecclesia, Cathedra Petri: I. Roma: Herder, 1991.

MLA (9th ed.) Citation

Maccarrone, Michele, et al. Romana Ecclesia, Cathedra Petri: I. Herder, 1991.