World Energy Conference. Conservation Commission & Ruttley, P. (1983). Energy 2000-2020: World prospects and regional stresses. Graham & Trotman.
Citazione stile Chigago Style (17a edizione)World Energy Conference. Conservation Commission e Philip Ruttley. Energy 2000-2020: World Prospects and Regional Stresses. London: Graham & Trotman, 1983.
Citatione MLA (9a ed.)World Energy Conference. Conservation Commission e Philip Ruttley. Energy 2000-2020: World Prospects and Regional Stresses. Graham & Trotman, 1983.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.