- Greg Johnson -- IMDb profile
- ToeJam & Earl Retrospective with Greg Johnson -- The Retro Hour Podcast episode 160 (2019-02-15)
- LinkedIn -- professional profile
- Interview: Greg Johnson -- Interviewed by Ken Horowitz for www.sega-16.com (2005).
- Greg Johnson (SEGA/ToeJam and Earl) – Interview -- Interview for ArcadeAttack about his career in the gaming industry (2015)
- Greg Johnson Toejam and Earl -- Interviewed by Peter Ward for RetroGamesMaster.co.uk