(2008). . University Textbooks; Research and Writting, 13(19), 1-156.
. "". University Textbooks; Research and Writting, 13, 19, 2008, 1-156.
(2008). '', University Textbooks; Research and Writting, 13(19), pp. 1-156.
. University Textbooks; Research and Writting, 2008; 13(19): 1-156.