U.S. Dept. of the Army. Civilian Personnel Division. Civilian personnel officer's course. s.n.
芝加哥风格引文U.S. Dept. of the Army. Civilian Personnel Division. Civilian Personnel Officer's Course. Washington: s.n.
MLA引文U.S. Dept. of the Army. Civilian Personnel Division. Civilian Personnel Officer's Course. s.n.
警告：这些引文格式不一定是100％准确.