APA (7e ed.) Bronvermelding

Não informado. (1950). Yearbook of International Trade Statistics. United Nations.

Chicago (17e ed.) Bronvermelding

Não informado. Yearbook of International Trade Statistics. New York: United Nations, 1950.

MLA (8e ed.) Bronvermelding

Não informado. Yearbook of International Trade Statistics. United Nations, 1950.

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