Cita APA (7a ed.)

Fretwell, S. D. (1972). Populations in a Seasonal Environment. (MPB-5). Princeton University Press.

Cita Chicago Style (17a ed.)

Fretwell, Stephen D. Populations in a Seasonal Environment. (MPB-5). Princeton, N.J.: Princeton University Press, 1972.

Cita MLA (8a ed.)

Fretwell, Stephen D. Populations in a Seasonal Environment. (MPB-5). Princeton University Press, 1972.