Παραπομπή σε μορφή APA (7η εκδ.)

Helfman, G. S. (2007). Fish conservation: A guide to understanding and restoring global aquatic biodiversity and fishery resources. Island Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Helfman, Gene S. Fish Conservation: A Guide to Understanding and Restoring Global Aquatic Biodiversity and Fishery Resources. Washington: Island Press, 2007.

Παραπομπή σε μορφή MLA (9th εκδ.)

Helfman, Gene S. Fish Conservation: A Guide to Understanding and Restoring Global Aquatic Biodiversity and Fishery Resources. Island Press, 2007.