(2009). . University Textbooks; Research and Writting, 14(23), 117-138.
. "", University Textbooks; Research and Writting, 14, 23, 2009, 117-138.
(2009). '', University Textbooks; Research and Writting, 14(23), pp. 117-138.
, "," University Textbooks; Research and Writting, 14 23 (2009): 117-138,
. University Textbooks; Research and Writting, 2009; 14(23): 117-138.
