http://uchiuwik.blogspot.co.id/2014/11/metode-metode-pengembangan-sistem.html

http://sdlcteknikprograman.blogspot.co.id/2012/11/sdlc-system-development-life-cycle.html

https://erihadiyana.wordpress.com/2008/11/03/jenis-jenis-pemodelan-pengembangan-sistem/

http://catatanngampusku.blogspot.co.id/2014/10/metodologi-sdlc.html

https://fatharaannisaa.wordpress.com/2014/08/22/macam-macam-metode-pengembangan-perangkat-lunak/

http://adikristanto.net/synchronize-and-stabilize/

https://dwijaantara.wordpress.com/2010/10/25/agile-method/