APA (7th ed.) Citation

Gregorio XV, . P., Felipe IV, . R. d. E., & Urbano VIII, . P. (1701). [Papeles varios].

Chicago Style (17th ed.) Citation

Gregorio XV, Papa, Rey de España Felipe IV, and Papa Urbano VIII. [Papeles Varios]. 1701.

MLA (9th ed.) Citation

Gregorio XV, Papa, et al. [Papeles Varios]. 1701.