Não informado. (1975). The Bell Journal of Economics. American Telephone and Telegraph Company.
Cita Chicago Style (17a ed.)Não informado. The Bell Journal of Economics. New York: American Telephone and Telegraph Company, 1975.
Cita MLA (8a ed.)Não informado. The Bell Journal of Economics. American Telephone and Telegraph Company, 1975.
Precaución: Estas citas no son 100% exactas.