Cita APA (7a ed.)

Krumm, R. (1987). Wordperfect 4.2 power tools. Management Information Source.

Cita Chicago Style (17a ed.)

Krumm, Robert. Wordperfect 4.2 Power Tools. Portland, OR: Management Information Source, 1987.

Cita MLA (9a ed.)

Krumm, Robert. Wordperfect 4.2 Power Tools. Management Information Source, 1987.