Christensen, H. T. (1964). Handbook of marriage and the family. Rand McNally & Company.
Lua i Stíl Chicago (17ú heag.)Christensen, Harold T. Handbook of Marriage and the Family. Chicago: Rand McNally & Company, 1964.
Lua MLA (9ú heag.)Christensen, Harold T. Handbook of Marriage and the Family. Rand McNally & Company, 1964.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.