na INLIS000000000021023 20210112110934 0010-1020000112 ta 210112 i 0 ind 978-623-00-0427-8 006 006.754 JEF b jefferly helianthusonfri Belajar social media marketing / Jefferly Helianthusonfri Cet. 1 Jakarta : Elex Media Komputindo, 2019 178 hlm : ilus ; 21 Cm Situs Jejaring Sosial, Sosial Media 71/DKP/2020/PKL