APA (7th ed.) Citation

Harms, H., Kraenzlin, F., & Wolff, H. (1928). Leguminosae americanae novae.

Chicago Style (17th ed.) Citation

Harms, Hermann, Fritz Kraenzlin, and Hermann Wolff. Leguminosae Americanae Novae. 1928.

MLA (9th ed.) Citation

Harms, Hermann, et al. Leguminosae Americanae Novae. 1928.