Cita APA (7a ed.)

SCHAEFER, R. T. Racial and ethnic groups.-- ed.2. Litle.

Cita Chicago Style (17a ed.)

SCHAEFER, Richard T. Racial and Ethnic Groups.-- Ed.2. Boston: Litle.

Cita MLA (9a ed.)

SCHAEFER, Richard T. Racial and Ethnic Groups.-- Ed.2. Litle.