Amartasya, M.S. and Cahyani, D.A. 2021. Kajian Analisa Usaha Sale Pisang Gulung di UD. Putra Roti Banjarnegara. Proceedings Series on Physical & Formal Sciences. 2, (Nov. 2021), 269–276. DOI:https://doi.org/10.30595/pspfs.v2i.199.