Shrivastava, A. (2010). Nature tourism. Centrum Press.
Cita Chicago (17th ed.)Shrivastava, Atul. Nature Tourism. New Delhi: Centrum Press, 2010.
Cita MLA (9th ed.)Shrivastava, Atul. Nature Tourism. Centrum Press, 2010.
Atenció: Aquestes cites poden no estar 100% correctes.