APA (7th ed.) Citation

Bernardus <Claraevallensis>. (1968). [Opera] S. Bernardi Opera. Ed. Cistercienses.

Chicago Style (17th ed.) Citation

Bernardus <Claraevallensis>. [Opera] S. Bernardi Opera. Romae: Ed. Cistercienses, 1968.

MLA (8th ed.) Citation

Bernardus <Claraevallensis>. [Opera] S. Bernardi Opera. Ed. Cistercienses, 1968.

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