APA (7th ed.) Citation

(1921). Humbert-Droz, Jules. . Brunner, Emil.

Chicago Style (17th ed.) Citation

Humbert-Droz, Jules. . Brunner, Emil. 1921.

MLA (8th ed.) Citation

Humbert-Droz, Jules. . Brunner, Emil. 1921.

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