APA: 
Caffau, Mauro (2002). Bournonia excavata (d´Orbigny) from the campanian-maastrichtian of Stranice (north-east of Slovenia). 
Geologija, letnik 45, številka 1, str. 91-96. 
URN:NBN:SI:DOC-3R4DWQQC from http://www.dlib.si
 
                           MLA: 
Caffau, Mauro. "Bournonia excavata (d´Orbigny) from the campanian-maastrichtian of Stranice (north-east of Slovenia)." 
Geologija letnik 45. številka 1 (2002) str. 91-96.
<http://www.dlib.si/?URN=URN:NBN:SI:DOC-3R4DWQQC>