"Johnny M. Riggs". Fort Rucker, Alabama: U.S. Army Aviation Museum. Retrieved March 20, 2021.
books.google.com
"Brigadier General (P) John M. Riggs". Department of Defense Appropriations for 1996: Hearings Before a Subcommittee of the Committee on Appropriations, House of Representatives, One Hundred Fourth Congress, First Session, Part 4. Washington, D.C.: U.S. Government Printing Office. 1996. ISBN9780160523960. Retrieved March 20, 2021.