APA (7th ed.) Citation

Sorel, G., Louzon, R., & Prugnot, J. (1947). Lettres a Paul Delesalle, 1914-1921. Bernard Grasset.

Chicago Style (17th ed.) Citation

Sorel, Georges, Robert Louzon, and Jean Prugnot. Lettres a Paul Delesalle, 1914-1921. Paris: Bernard Grasset, 1947.

MLA (9th ed.) Citation

Sorel, Georges, et al. Lettres a Paul Delesalle, 1914-1921. Bernard Grasset, 1947.