Schaefer, R. T. (2001). Race and ethnicity in the United States (2nd ed.). Prentice Hall.

Schaefer, Richard T. Race and Ethnicity in the United States. 2nd ed. Upper Saddle River, N.J.: Prentice Hall, 2001.

Schaefer, Richard T. Race and Ethnicity in the United States. 2nd ed. Prentice Hall, 2001.