A. Ariyanto, Y. . Syaukat, S. . Hartoyo, and B. M. Sinaga, “TECHNOLOGY ADOPTION AND TECHNICAL EFFICIENCY OF OIL PALM SMALLHOLDER PLANTATION IN RIAU AND WEST KALIMANTAN”, jma, vol. 17, no. 3, p. 239, Nov. 2020, doi: 10.17358/jma.17.3.239.