Cita APA (7a ed.)

Roux, J., Brenon, A., & Jachowicz-Davoust, B. (2006). The Cathars. MSM.

Cita Chicago Style (17a ed.)

Roux, Julie, Anne Brenon, y Barbara Jachowicz-Davoust. The Cathars. Vic-en-Bigorre: MSM, 2006.

Cita MLA (9a ed.)

Roux, Julie, et al. The Cathars. MSM, 2006.