Gosselin, Chantal
The ultimate guide to fitness
Vermilion, 1995
 Buku Referensi
Sparrow, Giles, 1970-
Mars : the ultimate guide to the Red Planet
Quercus, 2014
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Mason, Peter
Magazine law : a practical guide
Routledge, 1998
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Derfler, Frank J.
PC magazine guide to connectivity
Ziff-Davis Press, 1992
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Altman, Nathaniel
Healing spring: the ultimate guide to taking the waters
Healing Arts Press, 2000
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