Cita APA (7a ed.)

Vernberg. (1970). The animal and the enviroment. Holt, Rinehary and Winston.

Cita Chicago Style (17a ed.)

Vernberg. The Animal and the Enviroment. New York - EEUU: Holt, Rinehary and Winston, 1970.

Cita MLA (8a ed.)

Vernberg. The Animal and the Enviroment. Holt, Rinehary and Winston, 1970.