Pollack, M. A., & Shaffer, G. C. (2009). When cooperation fails: The international law and politics of genetically modified foods. Oxford University Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Pollack, Mark A., و Gregory C. Shaffer. When Cooperation Fails: The International Law and Politics of Genetically Modified Foods. Oxford ; New York: Oxford University Press, 2009.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Pollack, Mark A., و Gregory C. Shaffer. When Cooperation Fails: The International Law and Politics of Genetically Modified Foods. Oxford University Press, 2009.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.