Creep, R. O. (1963). Human fertility and population problems: Proceedings of the seminars. Schenkman Pub.
Cita Chicago (17th ed.)Creep, Roy Orval. Human Fertility and Population Problems: Proceedings of the Seminars. Cambridge, MA: Schenkman Pub, 1963.
Cita MLA (9th ed.)Creep, Roy Orval. Human Fertility and Population Problems: Proceedings of the Seminars. Schenkman Pub, 1963.
Atenció: Aquestes cites poden no estar 100% correctes.