Sanday, A.P., author
Understanding industrial society : teacher's guide
Hodder and Stoughton, 1979
 Buku Teks
Hart, Andrew, author
Understanding the media : a practical guide
Routledge, 1997
 Buku Referensi
Morris, Kenneth M., author
Guide to understanding money & investing
Lightbulb Press, 1998
 Buku Referensi
Thorn, Eric A., author
Understanding copyright : a practical guide
Jay Books, 1989
 Buku Referensi
Flick, Ernest W., author
Corrosion Inhibitors: an industrial guide
Noyes Publications, 1987
 Buku Referensi
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