SCHAEFER, R. T. Racial and ethnic groups.-- ed.2. Litle.
Lua i Stíl Chicago (17ú heag.)SCHAEFER, Richard T. Racial and Ethnic Groups.-- Ed.2. Boston: Litle.
Lua MLA (9ú heag.)SCHAEFER, Richard T. Racial and Ethnic Groups.-- Ed.2. Litle.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.