Cita APA (7th ed.)

O'Leary, T. J., Williams, . B. K., & O'Leary, L. I. (1990). WordPerfect 4.2. McGraw-Hill.

Cita Chicago (17th ed.)

O'Leary, T J., Brian K. Williams, i Linda I. O'Leary. WordPerfect 4.2. New York: McGraw-Hill, 1990.

Cita MLA (8th ed.)

O'Leary, T J., et al. WordPerfect 4.2. McGraw-Hill, 1990.