Cita APA (7th ed.)

Tibbetts, A. M., Tibbetts, C., & Steele, L. (1987). Practical business writing. Little, Brown.

Cita Chicago (17th ed.)

Tibbetts, A. M., Charlene Tibbetts, i Louise Steele. Practical Business Writing. Boston: Little, Brown, 1987.

Cita MLA (9th ed.)

Tibbetts, A. M., et al. Practical Business Writing. Little, Brown, 1987.