Cita APA (7th ed.)

Nichols, J. E. (1957). Livestock improvement in relation to heredity and environment (4th ed.). Oliver and Boyd.

Cita Chicago (17th ed.)

Nichols, J. E. Livestock Improvement in Relation to Heredity and Environment. 4th ed. Edinburgh [Lothian]: Oliver and Boyd, 1957.

Cita MLA (8th ed.)

Nichols, J. E. Livestock Improvement in Relation to Heredity and Environment. 4th ed. Oliver and Boyd, 1957.