Tomb of Horrors (English Wikipedia)

"Dungeons & Dragons FAQ". Wizards of the Coast. 2003. Archived from the original on August 18, 2000. Retrieved February 9, 2009.
Denmead, Ken (December 14, 2007). "Top 10 D&D Modules I Found in Storage This Weekend". Wired. Archived from the original on June 10, 2022. Retrieved January 26, 2009.
"Dungeons of Dread: Tomb of Horrors". Wizards of the Coast. Archived from the original on March 23, 2013. Retrieved June 22, 2013.
Cordell, Bruce R. (October 31, 2008). Adventures: Tomb of Horrors (revised). Wizards of the Coast. Retrieved on January 21, 2008.
"DM Rewards Program". Wizards of the Coast. Archived from the original on September 30, 2009. Retrieved March 24, 2011.
"Dungeons of Dread". Wizards of the Coast. Archived from the original on December 30, 2012. Retrieved June 22, 2013.
"Tales from the Yawning Portal". Wizards of the Coast. 2017-02-21. Archived from the original on January 5, 2017. Retrieved 2017-02-21.
"Infernal Machine Rebuild". Wizards of the Coast. Archived from the original on August 13, 2020.
Carroll, Bart (March 5, 2007). "Product Spotlight: Dungeonscape". Wizards of the Coast. Archived from the original on March 12, 2007. Retrieved January 26, 2009.
"The Tomb of Horrors". Readyplayerone.com. Archived from the original on 2012-05-10.
Crow, David; Cecchini, Mike (April 1, 2018). "Ready Player One: Complete Easter Egg and Reference Guide". Den of Geek. Dennis Publishing. Archived from the original on June 23, 2018. Retrieved April 1, 2018.

wired.com

Denmead, Ken (December 14, 2007). "Top 10 D&D Modules I Found in Storage This Weekend". Wired. Archived from the original on June 10, 2022. Retrieved January 26, 2009.

"Dungeons & Dragons FAQ". Wizards of the Coast. 2003. Archived from the original on August 18, 2000. Retrieved February 9, 2009.
"Dungeons of Dread: Tomb of Horrors". Wizards of the Coast. Archived from the original on March 23, 2013. Retrieved June 22, 2013.
"DM Rewards Program". Wizards of the Coast. Archived from the original on September 30, 2009. Retrieved March 24, 2011.
"Dungeons of Dread". Wizards of the Coast. Archived from the original on December 30, 2012. Retrieved June 22, 2013.
Carroll, Bart (March 5, 2007). "Product Spotlight: Dungeonscape". Wizards of the Coast. Archived from the original on March 12, 2007. Retrieved January 26, 2009.

"Tales from the Yawning Portal". Wizards of the Coast. 2017-02-21. Archived from the original on January 5, 2017. Retrieved 2017-02-21.
"Infernal Machine Rebuild". Wizards of the Coast. Archived from the original on August 13, 2020.

"Tomb of Horrors (Revised)" (PDF). Wizards of the Coast. Retrieved January 26, 2009.^{[dead link‍]}