APA (7th ed.) Citation

Laurentin, R., & Billet, B. (1957). Lourdes: Documents authentiques. Lethielleux.

Chicago Style (17th ed.) Citation

Laurentin, René, and Bernard Billet. Lourdes: Documents Authentiques. Paris: Lethielleux, 1957.

MLA (8th ed.) Citation

Laurentin, René, and Bernard Billet. Lourdes: Documents Authentiques. Lethielleux, 1957.

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