Hubbard, L. Ron, 1911-1986
Bridge Publications, Inc., 2012
Buku Referensi
Bierman, Harold
The Free Press, 1980
Buku Teks
Bullis, L. Harold
Westview Press, 1985
Buku Teks
Bullis, L. Harold
Westview Press, 1985
Buku Teks
Bass, Carol
Stewart, Tabori & Chang, 2008
Buku Teks