Document Type : Original Article
dadgar,Y . (2020). Economic systems. Encyclopedia of Economics, 3(1), 1-4.
dadgar,Y . "Economic systems", Encyclopedia of Economics, 3, 1, 2020, 1-4.
dadgar Y. (2020). 'Economic systems', Encyclopedia of Economics, 3(1), pp. 1-4.
Y dadgar, "Economic systems," Encyclopedia of Economics, 3 1 (2020): 1-4,
dadgar Y. Economic systems. Encyclopedia of Economics. 2020;3(1):1-4 (In Persian).