Stephanus Roy Wirawan, Hanny H Tumbelaka, and Murtiyanto Santoso. “Pembangkit Listrik Tenaga Hibrid Tenaga Surya 90 W Dan Tenaga Angin 200 W Di Universitas Kristen Petra”. SinarFe7, vol. 1, no. 1, July 2018, pp. 289-92, https://journal.fortei7.org/index.php/sinarFe7/article/view/191.