Halland, H., Lokanc, M., & Nair, A. (2015). The extractive industries sector: Essentials for economists, public finance professionals, and policy makers. World Bank Group.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Halland, Håvard, Martin Lokanc, و Arvind Nair. The Extractive Industries Sector: Essentials for Economists, Public Finance Professionals, and Policy Makers. Washington, District of Columbia: World Bank Group, 2015.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Halland, Håvard, et al. The Extractive Industries Sector: Essentials for Economists, Public Finance Professionals, and Policy Makers. World Bank Group, 2015.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.