Não informado. (1969). Family Planning Perspectives. Allan Guttmacher Institute.
Style de citation Chicago (17e éd.)Não informado. Family Planning Perspectives. New York: Allan Guttmacher Institute, 1969.
Style de citation MLA (8e éd.)Não informado. Family Planning Perspectives. Allan Guttmacher Institute, 1969.
Attention : ces citations peuvent ne pas être correctes à 100%.