APA (7th ed.) Citation

Oppenheim, P. (1940). Introductio in scientiam liturgicam. Marietti.

Chicago Style (17th ed.) Citation

Oppenheim, Philippus. Introductio in Scientiam Liturgicam. Taurini [etc.]: Marietti, 1940.

MLA (9th ed.) Citation

Oppenheim, Philippus. Introductio in Scientiam Liturgicam. Marietti, 1940.

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