International Planned Parenthood Federation. (1992). People & the Planet. Planet.
Citação do estilo Chicago (17ª ed.)International Planned Parenthood Federation. People & the Planet. London: Planet, 1992.
Citação MLA (8ª ed.)International Planned Parenthood Federation. People & the Planet. Planet, 1992.
警告：这些引文格式不一定是100％准确.