(2009). . Economic Research and Perspectives, 9(2), 173-192.
. "", Economic Research and Perspectives, 9, 2, 2009, 173-192.
(2009). '', Economic Research and Perspectives, 9(2), pp. 173-192.
, "," Economic Research and Perspectives, 9 2 (2009): 173-192,
. Economic Research and Perspectives, 2009; 9(2): 173-192.
