Sirjamaki, J. The American family in the twentieth century. Harvad university press.
Lua i Stíl Chicago (17ú heag.)Sirjamaki, John. The American Family in the Twentieth Century. Harvad university press.
Lua MLA (8ú heag.)Sirjamaki, John. The American Family in the Twentieth Century. Harvad university press.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.