APA (7th ed.) Citation

Sergent, A., & Harmel, C. (1949). Histoire de l'anarchie. Le Portulan.

Chicago Style (17th ed.) Citation

Sergent, Alain, and Claude Harmel. Histoire De L'anarchie. Le Portulan, 1949.

MLA (8th ed.) Citation

Sergent, Alain, and Claude Harmel. Histoire De L'anarchie. Le Portulan, 1949.

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