United States. Army. Camp Pena Colorado (Tex.) & United States. National Archives and Records Service. (1974). Camp Pena Colorado, Texas: Letters sent, registers of letters received, endorsements, letters received. National Archives and Records Service.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিUnited States. Army. Camp Pena Colorado (Tex.) এবং United States. National Archives and Records Service. Camp Pena Colorado, Texas: Letters Sent, Registers of Letters Received, Endorsements, Letters Received. Washington: National Archives and Records Service, 1974.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিUnited States. Army. Camp Pena Colorado (Tex.) এবং United States. National Archives and Records Service. Camp Pena Colorado, Texas: Letters Sent, Registers of Letters Received, Endorsements, Letters Received. National Archives and Records Service, 1974.