APA (7th ed.) Citation

Guardini, R., & Henrich, F. (1957). Vom Geist der Liturgie Werke..

Chicago Style (17th ed.) Citation

Guardini, Romano, and Franz Henrich. "Vom Geist Der Liturgie." Werke. 1957.

MLA (9th ed.) Citation

Guardini, Romano, and Franz Henrich. "Vom Geist Der Liturgie." Werke., 1957.

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