Unesco. (1975). Teacher's study guide on the biology of human populations. Unesco Press.
芝加哥风格引文Unesco. Teacher's Study Guide on the Biology of Human Populations. Paris: Unesco Press, 1975.
MLA引文Unesco. Teacher's Study Guide on the Biology of Human Populations. Unesco Press, 1975.
警告：这些引文格式不一定是100％准确.