Não informado. (1975). The Bell Journal of Economics. American Telephone and Telegraph Company.
Chicagoスタイル(17版)引用形式Não informado. The Bell Journal of Economics. New York: American Telephone and Telegraph Company, 1975.
MLA(8版)引用形式Não informado. The Bell Journal of Economics. American Telephone and Telegraph Company, 1975.
警告: この引用は必ずしも正確ではありません.