Analisis Implementasi Corporate Social Responsibility (Csr) Bedasarkan Global Reporting Initiative Guidelines (Studi Perbandingan Pt. Pertamina Tbk, Pt. Aneka Tambang Tbk, Pt. Indo Tambang Raya Megah Tbk Dan Pt. Kaltim Prima Coal Tbk Tahun 2014-2015) - Maulana, Novrizal (2017)