@misc{Witkowski_Zbigniew_Wpływ_2007,
 author={Witkowski, Zbigniew},
 copyright={Creative Commons Attribution BY 3.0 PL license},
 address={Kraków},
 howpublished={online},
 year={2007},
 publisher={Institute of Nature Conservation of the Polish Academy of Sciences},
 language={pol},
 title={Wpływ turystyki na ochronę przyrody},
 type={Text},
 URL={http://www.rcin.org.pl/Content/80435/PDF/KR038_98150_r2007_IntegOP-Witkowski-187-189.pdf},
 keywords={tourism, nature},
}