APA (7th ed.) Citation

Borst, A. (1991). Die Katharer. Herder.

Chicago Style (17th ed.) Citation

Borst, Arno. Die Katharer. Freiburg im Breisgau Basel Wien: Herder, 1991.

MLA (9th ed.) Citation

Borst, Arno. Die Katharer. Herder, 1991.

Warning: These citations may not always be 100% accurate.