Essential skills for management research
edited by David Partington
Sage, 2002
 Buku Teks SO
Sully, Philippa
Essential communication skills for nursing
Elsevier, 2005
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Sully, Philippa
Essential communication skills for nursing and midwifery
Mosby Elsevier, 2010
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Burns, Tom
Essential study skills : the complete guide to success at university /
Sage Publications, 2003
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Eisenberg, Michael B.
Information literacy: essential skills for the information age
Libraries Unlimited, 2004
 Buku Teks SO