na INLIS000000000004582 20180916012324 180916||||||||| | ||| |||| || | 979-99176-3-8 010-0918004582 id 302.2 302.2 Ash e Ashadi Siregar ETIKA KOMUNIKASI - Yogyakarta Pustaka Book Publisher 2006 288 hlm.; 14 cm x 21 cm