Παραπομπή σε μορφή APA (7η εκδ.)

Beeby, A., & Brennan, A. (2008). First ecology: Ecological principles and environmental issues (3rd ed.). Oxford University Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Beeby, Alan, και Anne-Maria Brennan. First Ecology: Ecological Principles and Environmental Issues. 3rd ed. Oxford: Oxford University Press, 2008.

Παραπομπή σε μορφή MLA (9th εκδ.)

Beeby, Alan, και Anne-Maria Brennan. First Ecology: Ecological Principles and Environmental Issues. 3rd ed. Oxford University Press, 2008.