APA استشهاد

Hughes, J. K. (1979). PL-I structured programming. John Wiley.

استشهاد بنمط شيكاغو

Hughes, Joan Kirkby. PL-I Structured Programming. New York: John Wiley, 1979.

MLA استشهاد

Hughes, Joan Kirkby. PL-I Structured Programming. John Wiley, 1979.