Jai Kim, Hyoung, et al. “Development of the ODCRE Cooking Teaching-Learning Model Using QR Code to Promote Creativity of 5-Year-Old Young Children”. International Journal of Engineering & Technology, vol. 7, no. 2.33, June 2018, pp. 1264-8, https://doi.org/10.14419/ijet.v7i2.33.18115.