Sabri Ehap H Purchase order management best practices Process, technology, and change management. Sabri Ehap H - Fort Lauderdale J.Ross Publishing 2007 - xxvii, 219p cm. ISBN: 1923159630 2453.54 Source: 274, 14/07/2009, PIONEER BOOK DISTRIBUTORS General Book Subjects--Topical Terms: Commerce Dewey Class. No.: X:89U, P7