Cita APA (7th ed.)

Stephens, D. W., & Krebs, J. R. (1986). Foraging theory. Princeton University Press.

Cita Chicago (17th ed.)

Stephens, David W., i John R. Krebs. Foraging Theory. Princeton: Princeton University Press, 1986.

Cita MLA (9th ed.)

Stephens, David W., i John R. Krebs. Foraging Theory. Princeton University Press, 1986.