Safaei Movahed, Saeed, nouri, firouz, Bafandeh, Hamideh, Nouri, Frouz, Safaee Movahed, Saeid (2020). Calculating the Training Return on Investment (ROI) In Pars Oil & Gas Company (P.O.G.C). * Quarterly Journal of Training and Development of Human Resources*, 7(24), 107-127. 10.52547/istd.7.24.0