Cita APA (7a ed.)

American Telephone and Telegraph Company. (1975). The Bell journal of economics. American Telephone and Telegraph Co.

Cita Chicago Style (17a ed.)

American Telephone and Telegraph Company. The Bell Journal of Economics. New York, N.Y.: American Telephone and Telegraph Co, 1975.

Cita MLA (9a ed.)

American Telephone and Telegraph Company. The Bell Journal of Economics. American Telephone and Telegraph Co, 1975.