Costa Rica, official standard names approved by the United States Board on Geographic Names.
APA Citation
United States. Office of Geography., United States Board on Geographic Names. (1956). Costa Rica, official standard names approved by the United States Board on Geographic Names. [Washington, D.C.: Office of Geography, Dept. of the Interior.
MLA Citation
United States. Office of Geography, and United States Board on Geographic Names. Costa Rica, Official Standard Names Approved by the United States Board On Geographic Names. [Washington, D.C.: Office of Geography, Dept. of the Interior, 1956.
Warning: These citations may not always be complete (especially for serials).