Gewirtz, Herman
How to prepare for SAT II : physics
Barron`s, 1994
 Buku Teks
Luther, William M.
The marketing plan: how to prepare and implement it
American Management Association;, 2011
 eBooks
Luther, William M.
The marketing plan: how to prepare and implement it
American Management Association;, 2011
 eBooks
Grimes, Ellen
How to prepare for the business law section of the C.P.A. examination
McGraw-Hill, 1978
 Buku Teks
Stapleton, John
How to prepare a marketing plan / John Stapleton
Gower Press, 1974
 Buku Teks