Pickens, W. Hubert H. Harrison: Philosopher of Harlem / William Pickens. American essays - Afro-american authors.(1992).
Chicago-Zitierstil (17. Ausg.)Pickens, William. "Hubert H. Harrison: Philosopher of Harlem / William Pickens." American Essays - Afro-american Authors.(1992) .
MLA-Zitierstil (8. Ausg.)Pickens, William. "Hubert H. Harrison: Philosopher of Harlem / William Pickens." American Essays - Afro-american Authors.(1992), .
警告：这些引文格式不一定是100％准确.