APA

United Nations, . (1999). Proceedings of the Expert Group Meeting on Trade and Envrionment in ESCWA Member Countries. New York: United Nations.

Chicago

United Nations, . 1999. Proceedings of the Expert Group Meeting on Trade and Envrionment in ESCWA Member Countries. New York: United Nations.

Harvard

United Nations, . (1999). Proceedings of the Expert Group Meeting on Trade and Envrionment in ESCWA Member Countries. New York: United Nations.

MLA

United Nations, . Proceedings of the Expert Group Meeting on Trade and Envrionment in ESCWA Member Countries. New York: United Nations. 1999.