Anugrah, D. 2016. Rancang Bangun Pengukur Laju Detak Jantung Berbasis PLC Mikro. Elinvo (Electronics, Informatics, and Vocational Education). 1, 3 (Nov. 2016), 163–170. DOI:https://doi.org/10.21831/elinvo.v1i3.10857.