Não informado. (1989). NTT Review. Nippon Telegraph and Telephone Corporation.
Chicagoスタイル(17版)引用形式Não informado. NTT Review. Tokyo: Nippon Telegraph and Telephone Corporation, 1989.
MLA(8版)引用形式Não informado. NTT Review. Nippon Telegraph and Telephone Corporation, 1989.
警告: この引用は必ずしも正確ではありません.