Cita APA (7a ed.)

Loosli, J. K., & McDonald, I. (1968). Nonprotein nitrogen in the nutrition of ruminants (1st edition.). FAO.

Cita Chicago Style (17a ed.)

Loosli, John K., y I.W McDonald. Nonprotein Nitrogen in the Nutrition of Ruminants. 1st edition. Roma: FAO, 1968.

Cita MLA (8a ed.)

Loosli, John K., y I.W McDonald. Nonprotein Nitrogen in the Nutrition of Ruminants. 1st edition. FAO, 1968.