(1992). the twentieth century. Bloomsbury.
Chicago Style (17th ed.) CitationThe Twentieth Century. Bloomsbury, 1992.
MLA引文The Twentieth Century. Bloomsbury, 1992.
警告：這些引文格式不一定是100％准確.
APA引文
(1992). the twentieth century. Bloomsbury.
Chicago Style (17th ed.) CitationThe Twentieth Century. Bloomsbury, 1992.
MLA引文The Twentieth Century. Bloomsbury, 1992.