Cita APA (7a ed.)

Hughes, H., Heath, M., & Metcalfe, D. (1962). Forages: The science of grassland agriculture (2nd edition.). Iowa State University Press.

Cita Chicago Style (17a ed.)

Hughes, H.D, M.E Heath, y D.S Metcalfe. Forages: The Science of Grassland Agriculture. 2nd edition. Ames: Iowa State University Press, 1962.

Cita MLA (8a ed.)

Hughes, H.D, et al. Forages: The Science of Grassland Agriculture. 2nd edition. Iowa State University Press, 1962.