Citazione Stile APA (7a Edizione)

World Bank Group. (1999). Natural gas: Private sector participation and market development. World Bank Group.

Citazione stile Chigago Style (17a edizione)

World Bank Group. Natural Gas: Private Sector Participation and Market Development. Washington, D.C: World Bank Group, 1999.

Citatione MLA (9a ed.)

World Bank Group. Natural Gas: Private Sector Participation and Market Development. World Bank Group, 1999.