Anggit K, Oktariantoro, et al. “Analysis and Implementation of Metode Collaborative Analysis Methods of Requirement and Design (CARD) on E-Commerce Website in Indonesia”. International Journal on Information and Communication Technology (IJoICT), vol. 1, no. 1, Mar. 2016, pp. 1-11, doi:10.21108/IJOICT.2015.11.3.