D.N. DWIVEDI, . (2003). MANAGERIAL ECONOMICS. new delhi: SANGAM BOOKS LTD.
D.N. DWIVEDI, . 2003. MANAGERIAL ECONOMICS. new delhi: SANGAM BOOKS LTD.
D.N. DWIVEDI, . MANAGERIAL ECONOMICS. new delhi: SANGAM BOOKS LTD. 2003.