. (2009). . University Textbooks; Research and Writting, 14(23), 7-18.
. "", University Textbooks; Research and Writting, 14, 23, 2009, 7-18.
. (2009). '', University Textbooks; Research and Writting, 14(23), pp. 7-18.
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. . University Textbooks; Research and Writting. 2009;14(23):7-18 (In Persian).
