Sparrow, Giles, 1970-
Mars : the ultimate guide to the Red Planet
Quercus, 2014
 Buku Referensi
Altman, Nathaniel
Healing springs: the ultimate guide to taking the waters
Healing Arts Press, 2000
 Buku Teks SO
Spadaccini, Michael
Entrepreneur magazine`s ultimate LLC compliance guide
Ep Entrepreneuir Press, 2011
 Buku Teks
Sanders, Jack, 1944-
Internet guide to birds and birding : the ultimate directory to the best sites online
Ragged Mountain Press/McGraw-Hill, 2000
 Buku Referensi
Biech, Elaine
ASTD's Ultimate train the trainer : a complete guide to training success
ASTD press, 2009
 Buku Teks