Creep, R. O. (1963). Human fertility and population problems: Proceedings of the seminars. Schenkman Pub.
Lua i Stíl Chicago (17ú heag.)Creep, Roy Orval. Human Fertility and Population Problems: Proceedings of the Seminars. Cambridge, MA: Schenkman Pub, 1963.
Lua MLA (9ú heag.)Creep, Roy Orval. Human Fertility and Population Problems: Proceedings of the Seminars. Schenkman Pub, 1963.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.