APA (7th ed.) Citation

United Nations Environment Programme. (1982). Trees as a guide to ecology: For every child a tree. United Nations Environment Programme.

Chicago Style (17th ed.) Citation

United Nations Environment Programme. Trees as a Guide to Ecology: For Every Child a Tree. Nairobi, Kenya: United Nations Environment Programme, 1982.

MLA (8th ed.) Citation

United Nations Environment Programme. Trees as a Guide to Ecology: For Every Child a Tree. United Nations Environment Programme, 1982.