Kusumaningsih, A., C. V. Angkoso, and D. Kuswanto. “Peningkatan Ekonomi Komunitas Tukang Becak Melalui Konversi Energi BBM-BBG”. Proceedings of Annual Conference on Community Engagement, Vol. 2, Oct. 2018, pp. 94-105, doi:10.15642/acce.v2i.41.