Citazione Stile APA (7a Edizione)
(1980). <The> Coal situation in the ECE region in 1978 and its prospects. United Nations.
Citazione stile Chigago Style (17a edizione)
<The> Coal Situation in the ECE Region in 1978 and Its Prospects. New York: United Nations, 1980.
Citatione MLA (9a ed.)
<The> Coal Situation in the ECE Region in 1978 and Its Prospects. United Nations, 1980.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.