Cita APA

Schaefer, R. T. (1990). Racial and ethnic groups (4th ed.). Harper Collins.

Citación estilo Chicago

Schaefer, Richard T. Racial and Ethnic Groups. 4th ed. USA: Harper Collins, 1990.

Cita MLA

Schaefer, Richard T. Racial and Ethnic Groups. 4th ed. Harper Collins, 1990.

Warning: These citations may not always be 100% accurate.