"Krypto Voices (Superman)". Behind The Voice Actors. Retrieved July 19, 2024. 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.
Manning, Shaun (July 23, 2009). "CCI: DC Comics Superman Panel". Comic Book Resources. Archived from the original on June 27, 2011. Retrieved January 16, 2011.
Manning, Shaun (July 23, 2009). "CCI: DC Comics Superman Panel". Comic Book Resources. Archived from the original on June 27, 2011. Retrieved January 16, 2011.
