APA (7th ed.) Citation

Schnaß, F., & Wilckens, R. (1926). Erdkundliches Quellenbuch. Zickfeldt.

Chicago Style (17th ed.) Citation

Schnaß, Franz, and Rudolf Wilckens. Erdkundliches Quellenbuch. Osterwieck am Harz: Zickfeldt, 1926.

MLA (9th ed.) Citation

Schnaß, Franz, and Rudolf Wilckens. Erdkundliches Quellenbuch. Zickfeldt, 1926.

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