na YOGYA-02090000040075 20090227025621.0 ind 979-757-193-9 010-020900000040075 004.678 004.678 Yan V T YANI, Ahmad Voip nelpon murah pake internet Ahmad Yani; penyunting, Andiek Kurniawan Jakarta Kawan Pustaka 2007 vi, 78 hlm ilus 23 cm Bibliografi : hlm. 76 Internet Kurniawan, Andiek YOPDYOG(B) 18-1107 2 07B0030905 07B0030906