APA: 
Vrtačnik, Metka, Kornhauser, Aleksandra (1989). The rule of information in Solving Developmental Problems with selected excamples. 
Knjižnica, letnik 33, številka 1. 
URN:NBN:SI:doc-ICFOBFXG from http://www.dlib.si
 
                           MLA: 
Vrtačnik, Metka, Kornhauser, Aleksandra. "The rule of information in Solving Developmental Problems with selected excamples." 
Knjižnica letnik 33. številka 1 (1989).
<http://www.dlib.si/?URN=URN:NBN:SI:doc-ICFOBFXG>