APA (7th ed.) Citation

Laurentin, R., & Billet, B. (1958). Lourdes. Lourdes documents authentiques.

Chicago Style (17th ed.) Citation

Laurentin, René, and Bernard Billet. "Lourdes." Lourdes Documents Authentiques 1958.

MLA (9th ed.) Citation

Laurentin, René, and Bernard Billet. "Lourdes." Lourdes Documents Authentiques, 1958.

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