Citação norma APA

International Planned Parenthood Federation, IPPF Central Medical Committee, Hardy, N., & Kestelman, P. (1971). Directory of contraceptives. International Planned Parenthood Federation.

Citação norma Chicago

International Planned Parenthood Federation, IPPF Central Medical Committee, Norman Hardy, and Philip Kestelman. Directory of Contraceptives. London: International Planned Parenthood Federation, 1971.

Citação norma MLA

International Planned Parenthood Federation, et al. Directory of Contraceptives. International Planned Parenthood Federation, 1971.

Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.