APA (7th ed.) Citation

Hughes, J. K. (1979). PL 1 structured programming (2. ed.). Wiley.

Chicago Style (17th ed.) Citation

Hughes, Joan K. PL 1 Structured Programming. 2. ed. New York [u.a.]: Wiley, 1979.

MLA (9th ed.) Citation

Hughes, Joan K. PL 1 Structured Programming. 2. ed. Wiley, 1979.