Pamungkas, T. 2023. Detection of the Use of Masks as an Effort to Prevent Covid-19 Using Gray Level Co-Occurrence Matrix (GLCM) Based on Learning Vector Quantization (LVQ). Journal of Advances in Information Systems and Technology. 4, 2 (Mar. 2023), 180-187. DOI:https://doi.org/10.15294/jaist.v4i2.61105.