APA:
Lobo, Heros Augusto Santos, Moretti, Edvaldo Cesar (2009). Tourism in caves and the conservation of the speleological heritage.
Acta carsologica, volume 38, issue 2/3, str. 265-276.
URN:NBN:SI:DOC-3AJ91FDO from http://www.dlib.si
MLA:
Lobo, Heros Augusto Santos, Moretti, Edvaldo Cesar. "Tourism in caves and the conservation of the speleological heritage."
Acta carsologica volume 38. issue 2/3 (2009) str. 265-276.
<http://www.dlib.si/?URN=URN:NBN:SI:DOC-3AJ91FDO>