3 literature references for Harpia harpyja (Linnaeus, 1758):

Author:
Year: 1998
Title:
Source: website, Zoonomen - Zoological Nomenclature Resource
Author: Gill, Frank, and Minturn Wright
Year: 2006
Title:
Source: Birds of the World: Recommended English Names
Author:
Year: 2005
Title:
Source: website, AOU Check-List (07-2005)