Hughes, L. To negro writers: Langston Hughes. American writers' congress.(ca. 1935).
Chicago-Zitierstil (17. Ausg.)Hughes, Langston. "To Negro Writers: Langston Hughes." American Writers' Congress.(ca. 1935) .
MLA-Zitierstil (8. Ausg.)Hughes, Langston. "To Negro Writers: Langston Hughes." American Writers' Congress.(ca. 1935), .
警告：這些引文格式不一定是100％准確.