Gardner Smith, W. Ethel waters: William Gardner Smith. American essays - Afro-american authors.(1992).
Chicago-Zitierstil (17. Ausg.)Gardner Smith, William. "Ethel Waters: William Gardner Smith." American Essays - Afro-american Authors.(1992) .
MLA-Zitierstil (8. Ausg.)Gardner Smith, William. "Ethel Waters: William Gardner Smith." American Essays - Afro-american Authors.(1992), .
警告：这些引文格式不一定是100％准确.