APA

Naciones Unidas, . (1958). Commodity trade statistics: according to the standard international trade classification. January-September 1957. New York: United Nations.

Chicago

Naciones Unidas, . 1958. Commodity trade statistics: according to the standard international trade classification. January-September 1957. New York: United Nations.

Harvard

Naciones Unidas, . (1958). Commodity trade statistics: according to the standard international trade classification. January-September 1957. New York: United Nations.

MLA

Naciones Unidas, . Commodity trade statistics: according to the standard international trade classification. January-September 1957. New York: United Nations. 1958.