Bronfenbrenner, U., & Condry, J. C. (1970). Two worlds of childhood: U.S. and U.S.S.R. Russell Sage Foundation.
Lua i Stíl Chicago (17ú heag.)Bronfenbrenner, Urie, agus John C. Condry. Two Worlds of Childhood: U.S. and U.S.S.R. New York, New York: Russell Sage Foundation, 1970.
Lua MLA (9ú heag.)Bronfenbrenner, Urie, agus John C. Condry. Two Worlds of Childhood: U.S. and U.S.S.R. Russell Sage Foundation, 1970.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.