Musaffa, Muhamad. “Proses Terjadinya Akad Dalam Transaksi”. An-Nawa: Jurnal Studi Islam 1, no. 2 (December 11, 2018): 99-117. Accessed December 18, 2019. http://jurnal.staiannawawi.com/index.php/annawa/article/view/122.