Dyfyniad APA

(1980). Pipes and tubes of iron or steel from Japan. Washington: USITC.

Dyfyniad Arddull Chicago

Pipes and Tubes of Iron or Steel From Japan. Washington: USITC, 1980.

Dyfyniad MLA

Pipes and Tubes of Iron or Steel From Japan. Washington: USITC, 1980.

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