APA (7th ed.) Citation

Hughes, J. K. (1979). PL/I structured programming (2nd ed.). Wiley.

Chicago Style (17th ed.) Citation

Hughes, Joan Kirkby. PL/I Structured Programming. 2nd ed. New York: Wiley, 1979.

MLA (9th ed.) Citation

Hughes, Joan Kirkby. PL/I Structured Programming. 2nd ed. Wiley, 1979.