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.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.