Khani Masoomabadi, Zabihollah, Khosravi, Ali, Eghbali, Naser. “Design and Implementation of the GABC Model to Calculate the Cost of Outsourcing Services with Emphasis on Sustainability Concepts.” JETAAF, vol. 2, no. 1, 2024, pp. -. https://doi.org/10.82563/jetaaf.2024.202405151119880