Cita APA (7th ed.)

Williams, R. E. (1991). Teach yourself... Quatro Pro. Management Information Source, Inc.

Cita Chicago (17th ed.)

Williams, Robert E. Teach Yourself... Quatro Pro. Oregon: Management Information Source, Inc, 1991.

Cita MLA (9th ed.)

Williams, Robert E. Teach Yourself... Quatro Pro. Management Information Source, Inc, 1991.