Dyfyniad APA

the World Bank. (2008). Doing Business 2008. World Bank Group.

Dyfyniad Arddull Chicago

the World Bank. Doing Business 2008. Washington: World Bank Group, 2008.

Dyfyniad MLA

the World Bank. Doing Business 2008. World Bank Group, 2008.

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