(1974). English 900 book six. Collier Macmillan International.
芝加哥风格引文English 900 Book Six. New York: Collier Macmillan International, 1974.
MLA引文English 900 Book Six. Collier Macmillan International, 1974.
警告：这些引文格式不一定是100％准确.
APA引文