APA (7th ed.) Citation

Nelson, H. D., & American University. Foreign Area Studies. (1984). Costa Rica, a country study (2nd ed.). For sale by the Supt. of Docs., U.S. G.P.O..

Chicago Style (17th ed.) Citation

Nelson, Harold D., and American University. Foreign Area Studies. Costa Rica, a Country Study. 2nd ed. Washington, D.C.: For sale by the Supt. of Docs., U.S. G.P.O., 1984.

MLA (8th ed.) Citation

Nelson, Harold D., and American University. Foreign Area Studies. Costa Rica, a Country Study. 2nd ed. For sale by the Supt. of Docs., U.S. G.P.O., 1984.