na INLIS000000000004773 20150119082926.0 a ||| | 170609| ||| | 979-526-873-2 0010-011500000002777 ibnu syamsi efisiensi, sistem dan prosedur kerja 1 jakarta bumi aksara 2004 viii, 96 hlm; 23 cm 0008/10/b1380/2008