Quinn, M. B. Robert Penn Warrenęs Promised Land: M. Bernetta Quinn. Robert Penn Warren's "Brother to Dragons" : a discussion.(1983).
Chicago-Zitierstil (17. Ausg.)Quinn, M. Bernetta. "Robert Penn Warrenęs Promised Land: M. Bernetta Quinn." Robert Penn Warren's "Brother to Dragons" : A Discussion.(1983) .
MLA-Zitierstil (8. Ausg.)Quinn, M. Bernetta. "Robert Penn Warrenęs Promised Land: M. Bernetta Quinn." Robert Penn Warren's "Brother to Dragons" : A Discussion.(1983), .
警告：這些引文格式不一定是100％准確.