APA (7th ed.) Citation

Ernest, V., & Vandervelde, E. (1920). Hector Denis, libre penseur. Bruxelles: Labor.

Chicago Style (17th ed.) Citation

Ernest, Victor, and Emile Vandervelde. Hector Denis, Libre Penseur. Bruxelles: Labor, 1920.

MLA (8th ed.) Citation

Ernest, Victor, and Emile Vandervelde. Hector Denis, Libre Penseur. Bruxelles: Labor, 1920.

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