Cita APA (7a ed.)

Schaefer, R. T. (1988). Racial and ethnic groups (3. ed.). Scott, Foresman and Co.

Cita Chicago Style (17a ed.)

Schaefer, Richard T. Racial and Ethnic Groups. 3. ed. Glenview, Ill. [u.a.]: Scott, Foresman and Co, 1988.

Cita MLA (8a ed.)

Schaefer, Richard T. Racial and Ethnic Groups. 3. ed. Scott, Foresman and Co, 1988.