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"Findings, Determinations And Recommendations". Report of Apollo 204 Review Board. NASA. April 5, 1967. Archived from the original on December 31, 2016. Retrieved July 9, 2008. No single ignition source of the fire was conclusively identified.
Dunbar, Brian (January 9, 2018). "Apollo 7". NASA. Retrieved July 9, 2018. See also: "Apollo 11 Mission Summary". The Apollo Program. Smithsonian National Air and Space Museum. Archived from the original on August 29, 2013. Retrieved July 9, 2018.
"Early Apollo". Apollo to the Moon: To Reach the Moon – Building a Moon Rocket. Smithsonian Institution, National Air and Space Museum. July 1999. Archived from the original on May 24, 2011. Retrieved April 3, 2011.
Gabettas, Chris (Spring 2010). "William Petersen: From ISU to CSI". Idaho State University Magazine. Vol. 20, no. 2. Idaho State University. Archived from the original on April 14, 2013. Retrieved October 19, 2015.
Burgess 2014, p. 59. Burgess, Colin (2014). Liberty Bell 7: the suborbital Mercury flight of Virgil I. Grissom. Cham: Springer-Praxis books in space exploration. ISBN978-3-319-04390-6. OCLC868042180.
Burgess 2014, p. 264. Burgess, Colin (2014). Liberty Bell 7: the suborbital Mercury flight of Virgil I. Grissom. Cham: Springer-Praxis books in space exploration. ISBN978-3-319-04390-6. OCLC868042180.