APA (7th ed.) Citation

Santangelo, P. H., Palma, E., & Larrañaga, E. d. (1953). Gregorio VII. Peuser.

Chicago Style (17th ed.) Citation

Santangelo, Pablo Héctor, Edith Palma, and Enrique de Larrañaga. Gregorio VII. Buenos Aires: Peuser, 1953.

MLA (9th ed.) Citation

Santangelo, Pablo Héctor, et al. Gregorio VII. Peuser, 1953.