Haynes, W. Warren (William Warren), 1921-1972
University of Kentucky Press, 1962
Buku Teks
Schroeder, Alice, author
Bloomsbury, 2008
Buku Teks
Wooden, Warren W.
University Press of Kentucky, 1986.
Buku Teks
Kaplan, A.D.H., author
Brookings Institutions, 1959
Buku Teks
Kalbach, Warren E.
McGraw-Hill Ryerson, 1971
Buku Teks