KRASHEN, S. D., & TERRELL, T. D. (1984). The natural approach: Language acquisition in the classroom. Pergamon Press.
芝加哥风格引文KRASHEN, Stephen D., 与 Tracy D. TERRELL. The Natural Approach: Language Acquisition in the Classroom. Oxford: Pergamon Press, 1984.
MLA引文KRASHEN, Stephen D., 与 Tracy D. TERRELL. The Natural Approach: Language Acquisition in the Classroom. Pergamon Press, 1984.
警告：这些引文格式不一定是100％准确.