Muhammad Sjaiful. Karakteristik Asas Kebebasan Berkontrak dalam Perjanjian Berbasis Syariah. PH [Internet]. 2015 May 3 [cited 2025 Dec. 19];15(1):68-84. Available from: https://perspektif-hukum.hangtuah.ac.id/index.php/jurnal/article/view/28