Cita APA (7a ed.)

Leaning, W. H., & Guerrero, J. (1987). The Economic impact of parasitism in cattle (1st edition.). Veterinary learning systems.

Cita Chicago Style (17a ed.)

Leaning, William H.D, y Jorge Guerrero. The Economic Impact of Parasitism in Cattle. 1st edition. New Jersey: Veterinary learning systems, 1987.

Cita MLA (8a ed.)

Leaning, William H.D, y Jorge Guerrero. The Economic Impact of Parasitism in Cattle. 1st edition. Veterinary learning systems, 1987.