SUBKI, MUHAMMAD NAZHIIM BIN SUBKI, et al. “Home Automation Using ESP-32 Development Board With Alexa Voice Assistant and Manual Switch”. Progress in Engineering Application and Technology, vol. 4, no. 2, Dec. 2023, pp. 319-32, https://publisher.uthm.edu.my/periodicals/index.php/peat/article/view/13104.