APA (7th ed.) Citation

Guardini, R. (1922). Vom Geist der Liturgie Ecclesia orans.

Chicago Style (17th ed.) Citation

Guardini, Romano. "Vom Geist Der Liturgie." Ecclesia Orans 1922.

MLA (8th ed.) Citation

Guardini, Romano. "Vom Geist Der Liturgie." Ecclesia Orans, 1922.

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