Rocks, shells, fossils, minerals & gems : the complete collector's companion
ed. by Harriet Stewart-Jones
Grange Books, 1998
 Buku Referensi
Moody, Richard
Field guide fossils
Chancelor, 1994
 Buku Teks
Pearl, Richard M.
How to know the minerals and rocks / Richard M. Pearl
McGraw-Hill, 1955
 Buku Teks
Murray, Michael T.
Stress, anxiety and insomnia: how you can denefit from dict, vitamins, minerals, herbs, exercise and other natural methods/Michael T. Murray
CA Prima, 1995
 Buku Teks
Berbar, Halim
Journey through Penang : a pictorial guide to the pearl of the orient
Times Editions-Marshall Cavendish, 2004
 Buku Referensi