Cole, Doris
Boston, I Press, 1973
Buku Teks
Hines, Thomas S., author
University of California Press, 1994
Buku Teks
O`Gorman, James F., author
NY Simon & Schuster, 1997
Buku Teks
Hynman, Isabelle, author
H.N. Abrams, 2001
Buku Teks
Mulfinger, Dale
Minnesota Historical Society Press, 1995
Buku Teks