Lo, Raymond
Feng shui and destiny for managers: the indispensable guide for every businessman
Times Books International, 1996
 Buku Teks SO
Kintner, Earl W.
A primer on the law of deceptive practices a guide for the businessman / by Earl W. Kintner
N.Y. Macmillan, 1971
 Buku Teks SO
Staff development: a practical guide
edited by Anne Grodzins Lipow and Deborah A. Carver
American Library Association, 1992
 Buku Teks SO
Betty, John Galtress, 1922-
Engineering contracts : a practical guide
McGraw-Hill, 1993
 Buku Teks SO
Hogan, Rex, 1944-
A practical guide to database design
Prentice-Hall, 1990
 Buku Teks SO