APA (7th ed.) Citation

Freudenberg, K. (1940). Organische chemie (1a ed.). [s.n.].

Chicago Style (17th ed.) Citation

Freudenberg, K. Organische Chemie. 1a ed. Leipzig: [s.n.], 1940.

MLA (9th ed.) Citation

Freudenberg, K. Organische Chemie. 1a ed. [s.n.], 1940.