Cita APA (7th ed.)

Williams, R. E. (1990). Teach yourself 1-2-3: Includes 2.2 and 3.0. Management Information Source.

Cita Chicago (17th ed.)

Williams, Robert E. Teach Yourself 1-2-3: Includes 2.2 and 3.0. Portland, Oregon: Management Information Source, 1990.

Cita MLA (8th ed.)

Williams, Robert E. Teach Yourself 1-2-3: Includes 2.2 and 3.0. Management Information Source, 1990.