Cita APA

Parks, D. H., & Parks, D. H. (1948). National economy of Costa Rica. Washington: Pan American Union.

Citación estilo Chicago

Parks, Douglas H., y Douglas H. Parks. National Economy of Costa Rica. Washington: Pan American Union, 1948.

Cita MLA

Parks, Douglas H., y Douglas H. Parks. National Economy of Costa Rica. Washington: Pan American Union, 1948.