Παραπομπή σε μορφή APA (7η εκδ.)

Abrahamson, W. G., & Weis, A. E. (1997). Evolutionary ecology across three trophic levels: Goldenrods, gallmakers, and natural enemies. Princeton University Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Abrahamson, Warren G., και Arthur Edward Weis. Evolutionary Ecology Across Three Trophic Levels: Goldenrods, Gallmakers, and Natural Enemies. Princeton: Princeton University Press, 1997.

Παραπομπή σε μορφή MLA (9th εκδ.)

Abrahamson, Warren G., και Arthur Edward Weis. Evolutionary Ecology Across Three Trophic Levels: Goldenrods, Gallmakers, and Natural Enemies. Princeton University Press, 1997.