Nortman, D. (1977). Changing contraceptive patterns: A global perspective. Population Reference Bureau.
Chicagoスタイル(17版)引用形式Nortman, Dorothy. Changing Contraceptive Patterns: A Global Perspective. Washington: Population Reference Bureau, 1977.
MLA(9版)引用形式Nortman, Dorothy. Changing Contraceptive Patterns: A Global Perspective. Population Reference Bureau, 1977.
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