APA (7th ed.) Citation

Burkett, R. K., Burkett, N. H., & Gates, H. L., Jr. (1991). Black biography, 1790-1950: A cumulative index. Chadwyck-Healey.

Chicago Style (17th ed.) Citation

Burkett, Randall K., Nancy Hall Burkett, and Henry Louis Gates, Jr. Black Biography, 1790-1950: A Cumulative Index. Alexandria: Chadwyck-Healey, 1991.

MLA (9th ed.) Citation

Burkett, Randall K., et al. Black Biography, 1790-1950: A Cumulative Index. Chadwyck-Healey, 1991.