Hyman, E. L. (1985). Analysis of policy options for meeting the demand for woodfuels in the province of Ilocos Norte, the Philippines. The University of North Carolina.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Hyman, Eric Lee. Analysis of Policy Options for Meeting the Demand for Woodfuels in the Province of Ilocos Norte, the Philippines. Chapel Hill: The University of North Carolina, 1985.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Hyman, Eric Lee. Analysis of Policy Options for Meeting the Demand for Woodfuels in the Province of Ilocos Norte, the Philippines. The University of North Carolina, 1985.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.