O'Hair, D., & Friedrich, G. W. (1997). Competent communication (2nd ed.). St. Martin's.
芝加哥风格引文O'Hair, Dan, 与 Gustav W. Friedrich. Competent Communication. 2nd ed. New York: St. Martin's, 1997.
MLA引文O'Hair, Dan, 与 Gustav W. Friedrich. Competent Communication. 2nd ed. St. Martin's, 1997.
警告：这些引文格式不一定是100％准确.