Spanagel. DeWitt Clinton and Amos Eaton. Johns Hopkins University Press.
芝加哥风格引文Spanagel. DeWitt Clinton and Amos Eaton. Johns Hopkins University Press.
MLA引文Spanagel. DeWitt Clinton and Amos Eaton. Johns Hopkins University Press.
警告：这些引文格式不一定是100％准确.