Henry, L. D. (1995). Was this heaven?: A self-portrait of Iowa on early postcards : a selection of postcards from the David A. Wilson collection. University of Iowa Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Henry, Lyell D. Was This Heaven?: A Self-portrait of Iowa on Early Postcards : A Selection of Postcards from the David A. Wilson Collection. Iowa City, Iowa: University of Iowa Press, 1995.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Henry, Lyell D. Was This Heaven?: A Self-portrait of Iowa on Early Postcards : A Selection of Postcards from the David A. Wilson Collection. University of Iowa Press, 1995.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.