Brase, Thomas. "Hardware / Hercules Computer Technology, HTC". retrocmp - retro computing. Retrieved 2023-03-01. https://retrocmp.de/hardware/hercules-card/hercules-card.htm#hicc
CBR Staff Writer (March 1987). "PERSONAL GRAPHICS: HERCULES TO BURST INTO 16 COLOURS". Tech Monitor. https://techmonitor.ai/technology/personal_graphics_hercules_to_burst_into_16_colours
"HERCULES INCOLOR Trademark - Registration Number 1499309 - Serial Number 73679040 :: Justia Trademarks". trademarks.justia.com. Retrieved 2023-03-01. http://trademarks.justia.com/736/79/hercules-incolor-73679040.html
Elliott, John C. (2012-08-05). "Hercules InColor Card: Notes". Archived from the original on 2016-11-23. Retrieved 2016-11-23. (Pictures and programming information) http://www.seasip.info/VintagePC/incolor.html
Wilton, Richard (1987). Programmer's guide to the PC & PS/2 video systems (1st ed.). Microsoft Press. ISBN 1-55615-103-9. (NB. The second edition does no longer discuss the InColor and MCGA cards at detail level.) 1-55615-103-9
Brown, Ralf D. (2012-01-21) [2000-07-16]. "Public Files on FTP.CS.CMU.EDU - The x86 Interrupt List aka "Ralf Brown's Interrupt List" (RBIL)". Archived from the original on 2016-06-16. Retrieved 2016-06-16. /wiki/Ralf_D._Brown
Brase, Thomas. "Hardware / Hercules Computer Technology, HTC". retrocmp - retro computing. Retrieved 2023-03-01. https://retrocmp.de/hardware/hercules-card/hercules-card.htm#hicc
CBR Staff Writer (March 1987). "PERSONAL GRAPHICS: HERCULES TO BURST INTO 16 COLOURS". Tech Monitor. https://techmonitor.ai/technology/personal_graphics_hercules_to_burst_into_16_colours
"Say You Saw It on Modern Electronics - The Hercules InColor Card" (PDF). Modern Electronics. May 1985. p. 67. https://worldradiohistory.com/hd2/IDX-Consumer/Archive-Modern-Electronics-IDX/IDX/Modern-Electronics-1988-05-OCR-Page-0067.pdf
"Say You Saw It on Modern Electronics - The Hercules InColor Card" (PDF). Modern Electronics. May 1985. p. 67. https://worldradiohistory.com/hd2/IDX-Consumer/Archive-Modern-Electronics-IDX/IDX/Modern-Electronics-1988-05-OCR-Page-0067.pdf
"Introducing the Hercules InColor Card". PC Magazine. June 9, 1987. p. 314. https://books.google.com/books?id=JMGL4vXOn1cC&dq=Hercules+InColor+Card+-wiki&pg=PA315
"Tech-Specs > Video Modes Supported > Hercules InColor". MobyGames. Retrieved 2023-03-01. https://www.mobygames.com/attributes/attribute/579/