Dyfyniad APA

(1998). World resources: A guide to the global environment 1998-99. Tata Energy Research Institute.

Dyfyniad Arddull Chicago

World Resources: A Guide to the Global Environment 1998-99. New Delhi: Tata Energy Research Institute, 1998.

Dyfyniad MLA

World Resources: A Guide to the Global Environment 1998-99. Tata Energy Research Institute, 1998.

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