Cita APA (7a ed.)

Gable, R. A. (1995). Toll-free services: A complete guide to design, implementation, and management. Artech House.

Cita Chicago Style (17a ed.)

Gable, Robert A. Toll-free Services: A Complete Guide to Design, Implementation, and Management. Boston [etc.]: Artech House, 1995.

Cita MLA (9a ed.)

Gable, Robert A. Toll-free Services: A Complete Guide to Design, Implementation, and Management. Artech House, 1995.