Robot, M.B. et al. 2017. TREN RETURN ON ASSET (ROA) PADA PT ASTRA AGRO LESTARI TBK PERIODE 2012 – 2016. AGRI-SOSIOEKONOMI. 13, 2 (Jun. 2017), 11–18. DOI:https://doi.org/10.35791/agrsosek.13.2.2017.16341.