Style de citation APA (7e éd.)

Não informado. (1987). UNCTAD commodity yearbook. United Nations.

Style de citation Chicago (17e éd.)

Não informado. UNCTAD Commodity Yearbook. New York: United Nations, 1987.

Style de citation MLA (8e éd.)

Não informado. UNCTAD Commodity Yearbook. United Nations, 1987.

Attention : ces citations peuvent ne pas être correctes à 100%.