Pertiwi M, Suprajang SE. EFEKTIFITAS EVENT SAMPLING SUSU ENTRASOL TERHADAP PENINGKATAN PEMBELI BARU (STUDI KASUS PADA PT. KALBE NUTRITIONALS). r [Internet]. 2017Mar.26 [cited 2026Jan.14];3(1). Available from: https://journal.stieken.ac.id/index.php/ritmik/article/view/254