APA引文

SMITH, C. B., & WARDHAUGH, R. (1980). Signals. Macmillan.

芝加哥风格引文

SMITH, Carl B., 与 ROnald WARDHAUGH. Signals. New York: Macmillan, 1980.

MLA引文

SMITH, Carl B., 与 ROnald WARDHAUGH. Signals. Macmillan, 1980.