APA (7th ed.) Citation

Du Bois, S. G. (1947). There was once a slave ...: The heroic story of Frederick Douglass. Julius Messner, Incorporated.

Chicago Style (17th ed.) Citation

Du Bois, Shirley Graham. There Was Once a Slave ...: The Heroic Story of Frederick Douglass. New York: Julius Messner, Incorporated, 1947.

MLA (9th ed.) Citation

Du Bois, Shirley Graham. There Was Once a Slave ...: The Heroic Story of Frederick Douglass. Julius Messner, Incorporated, 1947.