Wijayadne, Devi, Sutrisno, Timotius, Henryanto, Aria, AND Pasaribu, Bontor. " The effect of Supply Chain Practices on Business Performance in PT.Putra Tunggal Perkasa" Primanomics : Jurnal Ekonomi & Bisnis [Online], Volume 19 Number 1 (4 January 2021)