Walker, D., & Lang, P. (2007). The maverick and the machine: Governor Dan Walker tells his story. Southern Illinois University Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Walker, Daniel, و Peggy Lang. The Maverick and the Machine: Governor Dan Walker Tells His Story. Carbondale: Southern Illinois University Press, 2007.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Walker, Daniel, و Peggy Lang. The Maverick and the Machine: Governor Dan Walker Tells His Story. Southern Illinois University Press, 2007.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.