Fretwell, S. D. (1972). Populations in a seasonal environment. Princeton : Princeton University Press.
Chicago Style CitationFretwell, Stephen D. Populations in a Seasonal Environment. Princeton : Princeton University Press, 1972.
MLA CitationFretwell, Stephen D. Populations in a Seasonal Environment. Princeton : Princeton University Press, 1972.
Figyelmeztetés: Nem biztos, hogy ezek a forráshivatkozások 100%-ig pontosak.