APA (7th ed.) Citation

Waterlot, G., Beugnies, A., Bintz, J., & Hary, A. (1973). Ardenne. Masson.

Chicago Style (17th ed.) Citation

Waterlot, Gérard, Alphonse Beugnies, Jacques Bintz, and Armand Hary. Ardenne. Paris: Masson, 1973.

MLA (9th ed.) Citation

Waterlot, Gérard, et al. Ardenne. Masson, 1973.