Dyfyniad APA

(1990). Natural resources for a sustainable future: Spreading the benefits. Thailand: [s.n.].

Dyfyniad Arddull Chicago

Natural Resources for a Sustainable Future: Spreading the Benefits. Thailand: [s.n.], 1990.

Dyfyniad MLA

Natural Resources for a Sustainable Future: Spreading the Benefits. Thailand: [s.n.], 1990.

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