Nurwahidah, Nurwahidah, et al. “The Effects of Project Based Learning Model With Android on Scientific Literacy and Digital Equipedness ICT Literacy”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 36, no. 7, Dec. 2017, pp. 190-05, https://www.gssrr.org/JournalOfBasicAndApplied/article/view/8472.