Herianingrum S, Hapsari MI, Syahruddin S. Implementasi Nilai-nilai Amanah pada Karyawan Hotel Darussalam Pondok Pesantren Gontor di Ponorogo. AT [Internet]. 2015Jun.30 [cited 2024Dec.20];1(1):59-72. Available from: https://ejournal.unida.gontor.ac.id/index.php/altijarah/article/view/382