APA (7e ed.) Bronvermelding

United Nations Economic Commission for Europe. (1979). The Gas Situation in the ECE Region Around the Year 1990. ELSEVIER.

Chicago (17e ed.) Bronvermelding

United Nations Economic Commission for Europe. The Gas Situation in the ECE Region Around the Year 1990. ELSEVIER, 1979.

MLA (8e ed.) Bronvermelding

United Nations Economic Commission for Europe. The Gas Situation in the ECE Region Around the Year 1990. ELSEVIER, 1979.

Let op: Deze citaties zijn niet altijd 100% accuraat.