Alfons, M.E. and Batlajery, S. 2018. Implementation of Sales Forecasting Method In Production Planning In Cv Tirta Alam Jaya Merauke. International Journal of Social Science and Business. 2, 1 (Feb. 2018), 28–33. DOI:https://doi.org/10.23887/ijssb.v2i1.13693.