APA
United Nations. Economics Commission for Europe, United Nations. Economics Commission for Europe, . (1988). Spatial planning for recreation and tourism in the. New York: United Nations USA.
Chicago
United Nations. Economics Commission for Europe, United Nations. Economics Commission for Europe, . 1988. Spatial planning for recreation and tourism in the. New York: United Nations USA.
Harvard
United Nations. Economics Commission for Europe, United Nations. Economics Commission for Europe, . (1988). Spatial planning for recreation and tourism in the. New York: United Nations USA.
MLA
United Nations. Economics Commission for Europe, United Nations. Economics Commission for Europe, . Spatial planning for recreation and tourism in the. New York: United Nations USA. 1988.