Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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