APA (7th ed.) Citation

Oppenheim, P. (1945). Tractatus de textibus liturgicis. Officium libri catholici.

Chicago Style (17th ed.) Citation

Oppenheim, Philipp. Tractatus De Textibus Liturgicis. Roma: Officium libri catholici, 1945.

MLA (9th ed.) Citation

Oppenheim, Philipp. Tractatus De Textibus Liturgicis. Officium libri catholici, 1945.

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