Nortman, D. (1972). Population and family planning programs: A factbook (4th ed.). Population Council.
芝加哥风格引文Nortman, Dorothy. Population and Family Planning Programs: A Factbook. 4th ed. New York: Population Council, 1972.
MLA引文Nortman, Dorothy. Population and Family Planning Programs: A Factbook. 4th ed. Population Council, 1972.
警告：这些引文格式不一定是100％准确.