CORNISH, T., & HORNCASTLE, B. (1991). Central news: Activity book 4. Oxford Univ. Press.
芝加哥风格引文CORNISH, Tony, 与 Bill HORNCASTLE. Central News: Activity Book 4. New York: Oxford Univ. Press, 1991.
MLA引文CORNISH, Tony, 与 Bill HORNCASTLE. Central News: Activity Book 4. Oxford Univ. Press, 1991.
警告：这些引文格式不一定是100％准确.