Dyfyniad APA

Japan. Environment Agency. (1990). Quality of the environment in Japan. Environment Agency.

Dyfyniad Arddull Chicago

Japan. Environment Agency. Quality of the Environment in Japan. Japan: Environment Agency, 1990.

Dyfyniad MLA

Japan. Environment Agency. Quality of the Environment in Japan. Environment Agency, 1990.

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