. (2009). . University Textbooks; Research and Writting, 14(22), 39-48.
. "", University Textbooks; Research and Writting, 14, 22, 2009, 39-48.
. (2009). '', University Textbooks; Research and Writting, 14(22), pp. 39-48.
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. . University Textbooks; Research and Writting. 2009;14(22):39-48 (In Persian).
