Dyfyniad APA

World Bank. (1981). Agricultural research: Sector policy paper June 1981. World Bank.

Dyfyniad Arddull Chicago

World Bank. Agricultural Research: Sector Policy Paper June 1981. Washington,D C: World Bank, 1981.

Dyfyniad MLA

World Bank. Agricultural Research: Sector Policy Paper June 1981. World Bank, 1981.

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