LIBRO:Handbook of Buying and Purchasing Management Escrito por Harry E. Hough, James M. Ashley

http://books.google.com.co/books?id=S7gSTQtB99MC&dq=purchasing+management&printsec=frontcover&source=bl&ots=4t2DhkUs2F&sig=a82GY1DkojF_4FmR-7ck7VlZFcM&hl=es&sa=X&oi=book_result&resnum=6&ct=result#PPP1,M1