Hughes, Charles W., author
Columbia University Press, 1980
Buku Referensi
Hughes, Charles W., author
Columbia University Press, 1980
Buku Referensi
Wojtowicz, Robert, author
Cambridge University Press, 1998
Buku Teks
Hubbard, L. Ron, 1911-1986, author
Bridge Publications, Inc., 2012
Buku Referensi
Perosa, Sergio
New York University Press, 1985
Buku Teks