Konvitz, Milton Ridvas, 1908-2003, author
Ithaca, 1963
Buku Teks
Gunther, Gerald, author
Foundation Press, 1979
Buku Teks
Abernathy, Charles F., author
St. Paul Minn., 2000
Buku Teks
Gunther, Gerald, author
Foundation Press, 1973
Buku Teks
Cushman, Robert E., author
Appleton-Century-Crofts, 1963
Buku Teks