APA (7th ed.) Citation

Tobler, F. (1934). Oscar Drude ([Sonderdr.].).

Chicago Style (17th ed.) Citation

Tobler, F. Oscar Drude. [Sonderdr.]. 1934.

MLA (9th ed.) Citation

Tobler, F. Oscar Drude. [Sonderdr.]. 1934.

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