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.
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)United States. Army. Camp Pena Colorado (Tex.) và 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.
Trích dẫn kiểu MLA (xuất bản lần thứ 8)United States. Army. Camp Pena Colorado (Tex.) và 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.