Schaefer, R. T. (1990). Racial and ethnic groups (4th ed.). Harper Collins.
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Chicago Style (17th ed.) Citation
Schaefer, Richard T. Racial and Ethnic Groups. 4th ed. USA: Harper Collins, 1990.
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MLA引文
Schaefer, Richard T. Racial and Ethnic Groups. 4th ed. Harper Collins, 1990.
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警告：這些引文格式不一定是100％准確.