Dyfyniad APA

(1986). A completitive assessment of the U.S. ethylene industry. Washington: International Trade Administration.

Dyfyniad Arddull Chicago

A Completitive Assessment of the U.S. Ethylene Industry. Washington: International Trade Administration, 1986.

Dyfyniad MLA

A Completitive Assessment of the U.S. Ethylene Industry. Washington: International Trade Administration, 1986.

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