Schwabach, Robert.
The business week guide to global investment using electronic tools / Robert Schwabach
Osborne McGraw-Hill , 1994
 Buku Teks
Morrisey, George L.
Effective business and technical presentations / George L. Morrisey, Thomas L. Sechrest
Addison-Wesley, 1987
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Shurter, Robert L.
Written communication in business / Robert L. Shurter
McGraw-Hill, 1957
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Corley, Robert Neil
The legal environment of business / Robert N. Corley, Robert L. Black
McGraw-Hill, 1968
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Lehman, Carol M.
Creating dynamic multimedia presentations: using Microsoft power point 2003
Thomson South-Western, 2006
 Buku Teks