. (2011). . University Textbooks; Research and Writting, 15(24), 25-45.
. "", University Textbooks; Research and Writting, 15, 24, 2011, 25-45.
. (2011). '', University Textbooks; Research and Writting, 15(24), pp. 25-45.
, "," University Textbooks; Research and Writting, 15 24 (2011): 25-45,
. . University Textbooks; Research and Writting. 2011;15(24):25-45 (In Persian).
