APA (7th ed.) Citation

Sorge, F. A. 192.11.3a.12: Brieven van Engels aan Sorge.

Chicago Style (17th ed.) Citation

Sorge, Friedrich Adolph. 192.11.3a.12: Brieven Van Engels Aan Sorge.

MLA (8th ed.) Citation

Sorge, Friedrich Adolph. 192.11.3a.12: Brieven Van Engels Aan Sorge.

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