Friedmann, H. (1942). The natural-history background of camouflage. The Smithsonian Institution.
芝加哥风格引文Friedmann, Herbert. The Natural-history Background of Camouflage. Washington, D.C: The Smithsonian Institution, 1942.
MLA引文Friedmann, Herbert. The Natural-history Background of Camouflage. The Smithsonian Institution, 1942.
警告：这些引文格式不一定是100％准确.