Tunggak, B. and Tamjis, M.F. 2015. KONSEP AKAD AL-JU’ALAH DI DALAM PERUSAHAAN MULTI-LEVEL MARKETING (MLM) PATUH SYARIAH (THE CONCEPT OF AL-JU’ALAH CONTRACT IN SYARIAH COMPLIANT MULTI-LEVEL MARKETING COMPANY (MLM) ). UMRAN - International Journal of Islamic and Civilizational Studies. 2, 1 (Mar. 2015). DOI:https://doi.org/10.11113/umran2015.2n1.11.