Krashen, S. D. (1989). Language acquisition and language education. Prentice Hall International.
芝加哥风格引文Krashen, Stephen D. Language Acquisition and Language Education. New York: Prentice Hall International, 1989.
MLA引文Krashen, Stephen D. Language Acquisition and Language Education. Prentice Hall International, 1989.
警告：这些引文格式不一定是100％准确.