Document Type : Scientific-research
(2006). . The Mirror of Knowledge, 6(1), 40-.
. "", The Mirror of Knowledge, 6, 1, 2006, 40-.
(2006). '', The Mirror of Knowledge, 6(1), pp. 40-.
, "," The Mirror of Knowledge, 6 1 (2006): 40-,
. The Mirror of Knowledge, 2006; 6(1): 40-.
)