APA (7th ed.) Citation

Trochu, F., Matt, L. v., & Kessler, W. (1956). Bernadette Soubirous. Echter Verlag.

Chicago Style (17th ed.) Citation

Trochu, Francis, Leonard von Matt, and Walter Kessler. Bernadette Soubirous. Würzburg: Echter Verlag, 1956.

MLA (9th ed.) Citation

Trochu, Francis, et al. Bernadette Soubirous. Echter Verlag, 1956.