Ritonga, K., Marnis Nasution and Sahat Parulian Sitorus (2021) “Analysis of Promethee II Method Determines The Best Cooking Oil Ayam Penyet Cindelaras Rantauprapat”, Jurnal Mantik, 5(1), pp. 64-69. doi: 10.35335/mantik.Vol5.2021.1265.pp64-69.