DULAY, H., BURT, M., & KRASHEN, S. (1982). Language two. Oxford Univ. Press.
芝加哥风格引文DULAY, Heidi, Marina BURT, 与 Stephen KRASHEN. Language Two. New York: Oxford Univ. Press, 1982.
MLA引文DULAY, Heidi, et al. Language Two. Oxford Univ. Press, 1982.
警告：这些引文格式不一定是100％准确.