Pedley, Paul
Essential Law for information professionals
Facet, 2006
 Buku Teks
Manger, Jason J.
The essential internet information guide
McGraw-Hill, 1995
 Buku Referensi
Eisenberg, Michael B.
Information literacy: essential skills for the information age
Libraries Unlimited, 2004
 Buku Teks
Handbook of essential oils : science, technology, and applications
edited by K. Husnu Can Baser, Gerhard Buchbauer
CRC Press/Taylor & Francis, 2010
 Buku Teks
The McGraw-Hill handbook of essential engineering information and data
edited by Ejup N. Ganic, Tyler G. Hicks
McGraw-Hill, 1991
 Buku Teks