Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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