(2009). . Economic Research and Perspectives, 9(2), 123-144.
. "", Economic Research and Perspectives, 9, 2, 2009, 123-144.
(2009). '', Economic Research and Perspectives, 9(2), pp. 123-144.
, "," Economic Research and Perspectives, 9 2 (2009): 123-144,
. Economic Research and Perspectives, 2009; 9(2): 123-144.
