Hubbard, L. Ron, 1911-1986
L. Ron Hubbard : a profile
Bridge Publications, Inc., 2012
 Buku Referensi
Machiavelli, Niccolo
Dear Prince : the unexpurgated counsels of N. Machiavelli to Richard/translate by Edward L. Greenfield & Charles L. Mee,jr Milhous Nixon / translated by Edward L. Greenfield &​ Charles L. Mee, Jr.
American Heritage Press, 1969.
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Bierman, Harold
Strategic financial planning : a manager`s guide to improving profit performance
The Free Press, 1980
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Bullis, L. Harold
Strategic and critical materials / L. Harold Bullis and James E. Mielke
Westview Press, 1985
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Bullis, L. Harold
Strategic and critical materials / L. Harold Bullis and James E. Mielke
Westview Press, 1985
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