Dyfyniad APA

Nordstrom,Hakan, & Vaughan,Scatt. (1999). Trade and environment. World Trade Organization.

Dyfyniad Arddull Chicago

Nordstrom,Hakan, and Vaughan,Scatt. Trade and Environment. Geneva: World Trade Organization, 1999.

Dyfyniad MLA

Nordstrom,Hakan, and Vaughan,Scatt. Trade and Environment. World Trade Organization, 1999.

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