Cita APA (7a ed.)

Follett, R. F., & Hatfield, J. L. (2001). Nitrogen in the environment: Sources, problems, and management. Elsevier.

Cita Chicago Style (17a ed.)

Follett, R. F., y Jerry L. Hatfield. Nitrogen in the Environment: Sources, Problems, and Management. Amsterdam ; New York: Elsevier, 2001.

Cita MLA (8a ed.)

Follett, R. F., y Jerry L. Hatfield. Nitrogen in the Environment: Sources, Problems, and Management. Elsevier, 2001.