Cita APA (7a ed.)

Younger, V., & McKell, C. M. (1972). The biology and utilization of grasses. Academic Press.

Cita Chicago Style (17a ed.)

Younger, V., y C. M. McKell. The Biology and Utilization of Grasses. New York: Academic Press, 1972.

Cita MLA (8a ed.)

Younger, V., y C. M. McKell. The Biology and Utilization of Grasses. Academic Press, 1972.