APA: 
Lampela, Hannele, Taipale-Erävala, Kyllikki, Heilmann, Pia (2017). SME business models and competence changes. 
International journal of management, knowledge and learning, letnik 6, številka 2, str. 175-192, 301. 
URN:NBN:SI:DOC-E5QSQQIO from http://www.dlib.si