Dyfyniad APA

(1991). Pulp & paper statistics 1991. Japan: Japan Paper Association.

Dyfyniad Arddull Chicago

Pulp & Paper Statistics 1991. Japan: Japan Paper Association, 1991.

Dyfyniad MLA

Pulp & Paper Statistics 1991. Japan: Japan Paper Association, 1991.

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