APA (7th ed.) Citation

United Nations Environment Programme. (1986). A tree for peace: A global ceremony for World Environment Day. UNEP.

Chicago Style (17th ed.) Citation

United Nations Environment Programme. A Tree for Peace: A Global Ceremony for World Environment Day. Nairobi: UNEP, 1986.

MLA (9th ed.) Citation

United Nations Environment Programme. A Tree for Peace: A Global Ceremony for World Environment Day. UNEP, 1986.

Warning: These citations may not always be 100% accurate.