(1974). Learning about peoples and cultures. McDougal,Littell and Company.
芝加哥风格引文Learning About Peoples and Cultures. Evanston, Illinos: McDougal,Littell and Company, 1974.
MLA引文Learning About Peoples and Cultures. McDougal,Littell and Company, 1974.
警告：这些引文格式不一定是100％准确.