Al-Mass, A. M. (2003). Sustainable Agricultural Growth in the Al-Ahsa Oasis of Saudi Arabia: Harmonizing Wto Goals Environmental Constraints and National Food Security Issues. Indiana State University, Department of Geography, Geology, and Anthropology.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Al-Mass, Ahmad Mohammad. Sustainable Agricultural Growth in the Al-Ahsa Oasis of Saudi Arabia: Harmonizing Wto Goals Environmental Constraints and National Food Security Issues. Indiana, U S A: Indiana State University, Department of Geography, Geology, and Anthropology, 2003.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Al-Mass, Ahmad Mohammad. Sustainable Agricultural Growth in the Al-Ahsa Oasis of Saudi Arabia: Harmonizing Wto Goals Environmental Constraints and National Food Security Issues. Indiana State University, Department of Geography, Geology, and Anthropology, 2003.