CHEN, W., TAN, N. Y. L., LOOI, C.-K., ZHANG, B., & SEOW, P. S. K. (2008). HANDHELD COMPUTERS AS COGNITIVE TOOLS: TECHNOLOGY-ENHANCED ENVIRONMENTAL LEARNING. Research and Practice in Technology Enhanced Learning, 3(3), 231–252. https://doi.org/10.58459/rptel.2008.3231-252