Gilbert, P. T. (1921). The key to culture: Customs, manners and niceties of society. Geographical Pub.
芝加哥风格引文Gilbert, Paul Thomas. The Key to Culture: Customs, Manners and Niceties of Society. Chicago: Geographical Pub, 1921.
MLA引文Gilbert, Paul Thomas. The Key to Culture: Customs, Manners and Niceties of Society. Geographical Pub, 1921.
警告：这些引文格式不一定是100％准确.