. (2011). . University Textbooks; Research and Writting, 15(24), 81-94.
. "", University Textbooks; Research and Writting, 15, 24, 2011, 81-94.
. (2011). '', University Textbooks; Research and Writting, 15(24), pp. 81-94.
, "," University Textbooks; Research and Writting, 15 24 (2011): 81-94,
. . University Textbooks; Research and Writting. 2011;15(24):81-94 (In Persian).
