Dyfyniad APA

(1979). Directory of information sources in Japan, 1980. Tokyo: Nichigai Associates.

Dyfyniad Arddull Chicago

Directory of Information Sources in Japan, 1980. Tokyo: Nichigai Associates, 1979.

Dyfyniad MLA

Directory of Information Sources in Japan, 1980. Tokyo: Nichigai Associates, 1979.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.