APA (7th ed.) Citation

Ziechmann, W. (1994). Humic substances. BI-Wiss.-Verl.

Chicago Style (17th ed.) Citation

Ziechmann, Wolfgang. Humic Substances. Mannheim u.a: BI-Wiss.-Verl, 1994.

MLA (9th ed.) Citation

Ziechmann, Wolfgang. Humic Substances. BI-Wiss.-Verl, 1994.

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