Document Type : Original Article
Pourrostami,N . (2020). Production costs. Encyclopedia of Economics, 3(1), 1-6.
Pourrostami,N . "Production costs", Encyclopedia of Economics, 3, 1, 2020, 1-6.
Pourrostami N. (2020). 'Production costs', Encyclopedia of Economics, 3(1), pp. 1-6.
N Pourrostami, "Production costs," Encyclopedia of Economics, 3 1 (2020): 1-6,
Pourrostami N. Production costs. Encyclopedia of Economics. 2020;3(1):1-6 (In Persian).