APA aipamena

Nortman, D. (1977). Changing contraceptive patterns: A global perspective. Population Reference Bureau.

Chicago Style aipamena

Nortman, Dorothy. Changing Contraceptive Patterns: A Global Perspective. Washington: Population Reference Bureau, 1977.

MLA aipamena

Nortman, Dorothy. Changing Contraceptive Patterns: A Global Perspective. Population Reference Bureau, 1977.