Perry, W. E. (1981). Effective methods of EDP quality assurance (1st rev. ed.). Q.E.D.Information Sciences.
Cita Chicago (17th ed.)Perry, William E. Effective Methods of EDP Quality Assurance. 1st rev. ed. Wellesley, Mass.: Q.E.D.Information Sciences, 1981.
Cita MLA (8th ed.)Perry, William E. Effective Methods of EDP Quality Assurance. 1st rev. ed. Q.E.D.Information Sciences, 1981.
Atenció: Aquestes cites poden no estar 100% correctes.