Cita APA (7a ed.)

Greep, R. O. (1963). Human fertility and population problems. Schenkman Publishin Company.

Cita Chicago Style (17a ed.)

Greep, Roy O. Human Fertility and Population Problems. Massachusetts: Schenkman Publishin Company, 1963.

Cita MLA (8a ed.)

Greep, Roy O. Human Fertility and Population Problems. Schenkman Publishin Company, 1963.