. (2011). . University Textbooks; Research and Writting, 15(24), 95-110.
. "", University Textbooks; Research and Writting, 15, 24, 2011, 95-110.
. (2011). '', University Textbooks; Research and Writting, 15(24), pp. 95-110.
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. . University Textbooks; Research and Writting. 2011;15(24):95-110 (In Persian).
