APA (7th ed.) Citation

Hughes, J. K. (1979). PL/I structured programming (2nd edition.). John Wiley & Sons.

Chicago Style (17th ed.) Citation

Hughes, Joan K. PL/I Structured Programming. 2nd edition. New York: John Wiley & Sons, 1979.

MLA (8th ed.) Citation

Hughes, Joan K. PL/I Structured Programming. 2nd edition. John Wiley & Sons, 1979.

Warning: These citations may not always be 100% accurate.