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.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)United States. Army. Camp Pena Colorado (Tex.) و 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.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)United States. Army. Camp Pena Colorado (Tex.) و 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.