Adenan, I. N. S., & Shaari, M. F. (2023). Design and Develop Mineral Water Bottle Vending Machine Prototype Using Programmable Logic Controller with Single Rotary Dropping Mechanism. Progress in Engineering Application and Technology, 4(2), 512–517. https://publisher.uthm.edu.my/periodicals/index.php/peat/article/view/10136