Cita APA

van Berkum, P., & Bohlool, B. B. (1980). Evaluation of nitrogen fixation by bacteria in association with roots of tropical grasses.

Citación estilo Chicago

van Berkum, P., y B B. Bohlool. Evaluation of Nitrogen Fixation By Bacteria in Association With Roots of Tropical Grasses. 1980.

Cita MLA

van Berkum, P., y B B. Bohlool. Evaluation of Nitrogen Fixation By Bacteria in Association With Roots of Tropical Grasses. 1980.