Reference

1. https://damasterang.wordpress.com/2013/11/07/arti-uml-unified-modelling-language/
2. http://www.bangpahmi.com/2015/04/pengertian-unified-modelling-language-uml-dan-modelnya-menurut-pakar.html
3. http://informatika.web.id/pengertian-uml.html
4. https://bowoan.wordpress.com/2015/05/24/466/
5. https://blogkumpulanskripsihipertensi.blogspot.com/2019/08/contoh-contoh-use-case-pengisian-krs-pdf.html
6. Ratno Kustiawan (2010).Rekayasa Perangkat Lunak. Diakses 10 Oktober 2014.
7. Zatutmaryati (2011). Activity Diagram. Diakses 10 Oktober 2014.