Cita APA (7a ed.)

Ward, P. T., & Yourdon, E. (1984). Systems development without pain: A user's guide to modeling organizational patterns. Yourdon.

Cita Chicago Style (17a ed.)

Ward, Paul T., y Edward Yourdon. Systems Development Without Pain: A User's Guide to Modeling Organizational Patterns. New York: Yourdon, 1984.

Cita MLA (9a ed.)

Ward, Paul T., y Edward Yourdon. Systems Development Without Pain: A User's Guide to Modeling Organizational Patterns. Yourdon, 1984.