Croft, K. (1968). English pronunciation: A manual for teachers. Collier-Macmillan International.
芝加哥风格引文Croft, Kenneth. English Pronunciation: A Manual for Teachers. New York: Collier-Macmillan International, 1968.
MLA引文Croft, Kenneth. English Pronunciation: A Manual for Teachers. Collier-Macmillan International, 1968.
警告：这些引文格式不一定是100％准确.