APA citiranje

Constenla Umaña, M. A., Riley, D., Kennedy, S. H., Rojas Sánchez, C. E., Mora Alfaro, L. E., & Stevens, J. E. B. (1990). Paraquat Behavior in Costa Rican Soils and Residues in Coffee.

Citación estilo Chicago

Constenla Umaña, Manuel Arturo, Dave Riley, Steve H. Kennedy, Carlos Enrique Rojas Sánchez, Luis Enrique Mora Alfaro, y John E. B. Stevens. Paraquat Behavior in Costa Rican Soils and Residues in Coffee. 1990.

MLA citiranje

Constenla Umaña, Manuel Arturo, et al. Paraquat Behavior in Costa Rican Soils and Residues in Coffee. 1990.