Dyfyniad APA

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

Dyfyniad Arddull Chicago

Schaefer, Richard T. Racial and Ethnic Groups. 3rd ed. Glenview, Ill.: Scott, Foresman, 1988.

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.