MLA

Gay, Charles Louis, and Louis Baunard. Correspondance De Monseigneur Gay. Paris: Oudin, 1899.

APA

Gay, C. Louis, & Baunard, L. (1899). Correspondance de Monseigneur Gay. Paris: Oudin.

Chicago

Gay, Charles Louis, and Louis Baunard. Correspondance De Monseigneur Gay. Paris: Oudin, 1899.