APA (7th ed.) Citation

Guardini, R., & Lorson, P. (1950). L'essence du christianisme. Alsatia.

Chicago Style (17th ed.) Citation

Guardini, Romano, and Pierre Lorson. L'essence Du Christianisme. Paris: Alsatia, 1950.

MLA (9th ed.) Citation

Guardini, Romano, and Pierre Lorson. L'essence Du Christianisme. Alsatia, 1950.

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