Barberis, M. (1981). The Global population predicament: Policy implications. Population Reference Bureau.
芝加哥风格引文Barberis, Mary. The Global Population Predicament: Policy Implications. Washington, D.C.: Population Reference Bureau, 1981.
MLA引文Barberis, Mary. The Global Population Predicament: Policy Implications. Population Reference Bureau, 1981.
警告：这些引文格式不一定是100％准确.