APA (7e ed.) Bronvermelding

Não informado. (1956). Half-yearly Bulletin of Electric Energy Statistics for Europe. United Nations, Economic Commission for Europe.

Chicago (17e ed.) Bronvermelding

Não informado. Half-yearly Bulletin of Electric Energy Statistics for Europe. New York: United Nations, Economic Commission for Europe, 1956.

MLA (8e ed.) Bronvermelding

Não informado. Half-yearly Bulletin of Electric Energy Statistics for Europe. United Nations, Economic Commission for Europe, 1956.

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