Cita APA (7th ed.)

O'Leary, T. J., Williams, B. K., & O'Leary, L. I. (1992). Quattro. McGraw-Hill.

Cita Chicago (17th ed.)

O'Leary, Timothy J., Brian K. Williams, i Linda I. O'Leary. Quattro. [New York]: McGraw-Hill, 1992.

Cita MLA (9th ed.)

O'Leary, Timothy J., et al. Quattro. McGraw-Hill, 1992.