APA (7th ed.) Citation

Benet XVI, p., Coco, L., & Ronchi, E. M. (2007). Pensaments marians. Claret.

Chicago Style (17th ed.) Citation

Benet XVI, papa, Lucio Coco, and Ermes Maria Ronchi. Pensaments Marians. Barcelona: Claret, 2007.

MLA (9th ed.) Citation

Benet XVI, papa, et al. Pensaments Marians. Claret, 2007.