Your world :
international photographic competition on the environment 1991-1992 /
UNEP ; afterword by Vladimir Chernushenko.
APA Citation
United Nations Environment Programme. (1992). Your world: international photographic competition on the environment 1991-1992. London: Harvill.
MLA Citation
United Nations Environment Programme. Your World: International Photographic Competition On the Environment 1991-1992. London: Harvill, 1992.
Warning: These citations may not always be complete (especially for serials).