S. Djohar, H. Tanjung, and E. R. Cahyadi, “MEMBANGUN KEUNGGULAN KOMPETITIF CPO MELALUI SUPPLY CHAIN MANAGEMENT: STUDI KASUS DI PT. EKA DURA INDONESIA, ASTRA AGRO LESTARI, RIAU”, jma, vol. 1, no. 1, pp. 42–54, Aug. 2011, doi: 10.17358/jma.1.1.42-54.