Kowalski, Ronald
Routledge, 1997
Buku Teks
Sternberg, Fritz, author
The John Day, 1953
Buku Teks
Shteppa, Konstantin F., author
Rutgers University Press, 1962
Buku Teks
Galeotti, Mark, author
St. Martins Press, 1997
Buku Teks
Harvard University Press, 1955
Buku Teks