APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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