na INLIS000000000005640 20130515154106 ind 979-3503-71-8 0010-051300000005640 ind 153.8 153.8 Marpaung, Parlindungan Setengah Isi Setengah Kosong (Half Full - Half Empty) / editor, Bambang, Trim Cetakan : 6 Bandung MQS Publishing 2006 xxii, 334 hlm. ;17.5 cm. Motivasi