1. Kenneth W. Clarkson, Gaylord A. Jentz, Frank B. Cross, Roger LeRoy Miller-Business Law_ Text and

Library: Central Library Yasuj University (Kohgiluye va Buyer ahmad)

2. Roger LeRoy Miller, Gaylord A. Jentz-Business Law Today_ Comprehensive 8th Edition -South-Western College_West (2009).pdf

Library: Central Library Yasuj University (Kohgiluye va Buyer ahmad)

3. Roger LeRoy Miller, Gaylord A. Jentz-Business Law Today, Standard Edition -South-Western College_West (2010).pdf

Library: Central Library Yasuj University (Kohgiluye va Buyer ahmad)