Referensi

http://5000an.blogspot.com/2013/01/v-model.html

http://rapidapplicationdevelopmentrad.blogspot.com/

http://waliadigunawan.blogspot.com/2009/12/waterfall-model.html

http://anthonythee.blogspot.com/2013/01/simple-interaction-design-model.html

http://rusliyuli25.blogspot.com/2013/01/model-siklus-hidup-dan-proses.html