APA (7th ed.) Citation

Ford, H., Foerster, A., & Crowther, S. Le progrès. Payot (Paris).

Chicago Style (17th ed.) Citation

Ford, Henry, Arthur Foerster, and Samuel Crowther. Le Progrès. Payot (Paris).

MLA (8th ed.) Citation

Ford, Henry, et al. Le Progrès. Payot (Paris).