APA (7th ed.) Citation

Niggli, P. (1940). Schnee und Firn.

Chicago Style (17th ed.) Citation

Niggli, Paul. Schnee Und Firn. Zürich, 1940.

MLA (9th ed.) Citation

Niggli, Paul. Schnee Und Firn. 1940.

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