Schaefer, R. T. (1984). Racial and ethnic groups (2. ed.). Little, Brown and Co.
Cita Chicago Style (17a ed.)Schaefer, Richard T. Racial and Ethnic Groups. 2. ed. Boston [u.a.]: Little, Brown and Co, 1984.
Cita MLA (8a ed.)Schaefer, Richard T. Racial and Ethnic Groups. 2. ed. Little, Brown and Co, 1984.
Precaución: Estas citas no son 100% exactas.