APA (7th ed.) Citation

Washington, B. T., Du Bois, W. E. B., & Johnson, J. W. (1965). Three Negro classics. Avon Books.

Chicago Style (17th ed.) Citation

Washington, Booker T., W. E. B. Du Bois, and James Weldon Johnson. Three Negro Classics. New York: Avon Books, 1965.

MLA (9th ed.) Citation

Washington, Booker T., et al. Three Negro Classics. Avon Books, 1965.