"Keith Ferguson (visual voices guide)". Behind The Voice Actors. Retrieved June 27, 2015. – A green check mark indicates that a role has been confirmed using a screenshot (or collage of screenshots) of a title's list of voice actors and their respective characters found in its credits or other reliable sources of information.
"Destroy All Humans! 2: Make War Not Love (2006 Video Game)". Behind The Voice Actors (A green check mark indicates that a role has been confirmed using a screenshot (or collage of screenshots) of a title's list of voice actors and their respective characters found in its credits or other reliable sources of information). Retrieved September 25, 2021.
