APA引文

Robinson, B. (1989). Focus: An ESL grammar. New York: St. Martin's Press.

Trích dẫn kiểu Chicago

Robinson, Barbara. Focus: An ESL Grammar. New York: St. Martin's Press, 1989.

MLA引文

Robinson, Barbara. Focus: An ESL Grammar. New York: St. Martin's Press, 1989.

警告：这些引文格式不一定是100％准确.