Weales, Gerald Clifford, 1925-, author
Macmillan, 1969
Buku Teks
Berkowitz, Gerald M., author
Longman, 1994
Buku Teks
Gagey, Edmond M., author
Columbia University Press, 1948
Buku Teks
Downer, Alan, author
University of Minnesota Press, 1961
Buku Teks
Cynthia Lucia, Roy Grundmann, Arthur Simon, editors
Wiley Balckwell, 2016
Buku Teks