Cita APA

Claudy, N. H. (1996). International directory of geoscience organizations (2a. ed.). Virginia: U.S. Geological Survey.

Citación estilo Chicago

Claudy, Nicholas H. International Directory of Geoscience Organizations. 2a. ed. Virginia: U.S. Geological Survey, 1996.

Cita MLA

Claudy, Nicholas H. International Directory of Geoscience Organizations. 2a. ed. Virginia: U.S. Geological Survey, 1996.