Não informado. (1972). Current literature in family planning. Planned Parenthood Federation of America.
Cita Chicago Style (17a ed.)Não informado. Current Literature in Family Planning. New York: Planned Parenthood Federation of America, 1972.
Cita MLA (8a ed.)Não informado. Current Literature in Family Planning. Planned Parenthood Federation of America, 1972.
Precaución: Estas citas no son 100% exactas.