Krumm, R. (1987). Word perfect 4.2 power tools. Management Information Source, Inc.
Cita Chicago (17th ed.)Krumm, Rob. Word Perfect 4.2 Power Tools. Oregon: Management Information Source, Inc, 1987.
Cita MLA (9th ed.)Krumm, Rob. Word Perfect 4.2 Power Tools. Management Information Source, Inc, 1987.
Atenció: Aquestes cites poden no estar 100% correctes.