Cita APA (7a ed.)

Lansing, C. (1998). Power & purity: Cathar heresy in Medieval Italy. Oxford University Press.

Cita Chicago Style (17a ed.)

Lansing, Carol. Power & Purity: Cathar Heresy in Medieval Italy. New York [etc.]: Oxford University Press, 1998.

Cita MLA (9a ed.)

Lansing, Carol. Power & Purity: Cathar Heresy in Medieval Italy. Oxford University Press, 1998.