APA (7th ed.) Citation

Borst, A. (1953). Die Katharer Monumenta Germaniae historica / Schriften.

Chicago Style (17th ed.) Citation

Borst, Arno. "Die Katharer." Monumenta Germaniae Historica / Schriften 1953.

MLA (8th ed.) Citation

Borst, Arno. "Die Katharer." Monumenta Germaniae Historica / Schriften, 1953.

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