Widiantoro, A., D. S. Panggayudi, and N. D. C. Fringgani. “Automatic Visible Data Visible Licensing System Using Electronic Door Using RFID (Radio Frequency Identification), Arduino Mega 2560 and Visual Basic.Net”. The International Journal of Science & Technoledge, vol. 5, no. 9, Sept. 2017, http://internationaljournalcorner.com/index.php/theijst/article/view/123648.