na INLIS000000000051645 $a 0010-1118000186 $a Instant Marketing for Busy People $a Ardhi Ridwansyah $a Ed. 1 $a Jakarta : $b Erlangga $a 134 hlm : Cet. 1 ; 20 cm ; $c 134 hlm : Cet. 1 ; 20 cm $a 978-602-6847-32-4 $a 00000051413