Peoples Democratic Republic of Yemen :
official standard names approved by the United States Board on Geographic Names /
prepared by the Defense Mapping Agency Topographic Center.
APA Citation
United States. Defense Mapping Agency. Topographic Center. (1976). Peoples Democratic Republic of Yemen: official standard names approved by the United States Board on Geographic Names. Washington: The Board.
MLA Citation
United States. Defense Mapping Agency. Topographic Center. Peoples Democratic Republic of Yemen: Official Standard Names Approved by the United States Board On Geographic Names. Washington: The Board, 1976.
Warning: These citations may not always be complete (especially for serials).