Cita APA (7a ed.)

Schaefer, R. T. (1978). Racial and ethnic groups. Little, Brown and Co.

Cita Chicago Style (17a ed.)

Schaefer, Richard T. Racial and Ethnic Groups. Boston [u.a.]: Little, Brown and Co, 1978.

Cita MLA (9a ed.)

Schaefer, Richard T. Racial and Ethnic Groups. Little, Brown and Co, 1978.