Rosyad, Ilyas, Sari Narulita, and Andy Hadiyanto. 2015. “Upaya Optimalisasi Kinerja Pegawai Melalui Penerapan Nilai-Nilai Spiritualitas Islam: (Studi Kasus Di PT. Pandu Siwi Sentosa)”. Jurnal Studi Al-Qur’an 11 (2):145-56. https://doi.org/10.21009/JSQ.011.2.04.