APA (7th ed.) Citation

Sowell, T., & Collins, L. D. (1978). Essays and data on American ethnic groups. [Urban Institute].

Chicago Style (17th ed.) Citation

Sowell, Thomas, and Lynn D. Collins. Essays and Data on American Ethnic Groups. [Washington]: [Urban Institute], 1978.

MLA (9th ed.) Citation

Sowell, Thomas, and Lynn D. Collins. Essays and Data on American Ethnic Groups. [Urban Institute], 1978.