Welch, D. J. (1985). Adaptation to environmental unpredictability: Intensive agriculture and regional exchange at late prehistoric centers in the Phimai region, Thailand. University of Hawaii.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Welch, David J. Adaptation to Environmental Unpredictability: Intensive Agriculture and Regional Exchange at Late Prehistoric Centers in the Phimai Region, Thailand. Honolulu: University of Hawaii, 1985.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Welch, David J. Adaptation to Environmental Unpredictability: Intensive Agriculture and Regional Exchange at Late Prehistoric Centers in the Phimai Region, Thailand. University of Hawaii, 1985.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.