Cita APA (7a ed.)

Polisciano, G., & Farina, O. (2010). National parks: Vegetation, wildlife and threats. Nova Science Publishers, Inc..

Cita Chicago Style (17a ed.)

Polisciano, Grazia, y Olmo Farina. National Parks: Vegetation, Wildlife and Threats. New York: Nova Science Publishers, Inc., 2010.

Cita MLA (8a ed.)

Polisciano, Grazia, y Olmo Farina. National Parks: Vegetation, Wildlife and Threats. Nova Science Publishers, Inc., 2010.