APA (7th ed.) Citation

Berlitz, M. D. (1917). Le français commercial. Berlitz Schools of Languages.

Chicago Style (17th ed.) Citation

Berlitz, Maximilien Delphinus. Le Français Commercial. Paris [etc.]: Berlitz Schools of Languages, 1917.

MLA (9th ed.) Citation

Berlitz, Maximilien Delphinus. Le Français Commercial. Berlitz Schools of Languages, 1917.

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