Powell, R. J. (2007). "The Aaron Douglas Effect". In S. Earle (Ed.), Aaron Douglas: African American Modernist (pp. 53–73). Yale University Press, New Haven, CT.

Powell, Richard J. “"The Aaron Douglas Effect".” In Aaron Douglas: African American Modernist, edited by Susan Earle, 53–73. Yale University Press, New Haven, CT, 2007.

Powell RJ. "The Aaron Douglas Effect". In: Earle S, editor. Aaron Douglas: African American Modernist. Yale University Press, New Haven, CT; 2007. p. 53–73.

Powell, Richard J. “"The Aaron Douglas Effect".” Aaron Douglas: African American Modernist, edited by Susan Earle, Yale University Press, New Haven, CT, 2007, pp. 53–73.

Powell RJ. "The Aaron Douglas Effect". In: Earle S, editor. Aaron Douglas: African American Modernist. Yale University Press, New Haven, CT; 2007. p. 53–73.