Hatt, John
The tropical traveller : an essential guide to travel in hot chimates
Pan Books, 1982
Buku Teks SO
Muhammad Arvid Suhada
A Traveller's guide to Pakistan / Hilary Adamson, Isobel Shaw
The Asian Study Group , 1981
Buku Teks SO
The British Broadcasting Corporation (BBC) guide to parliament
British Broadcasting Corporation, 1979
Buku Teks SO
Sparrow, Giles, 1970-
Mars : the ultimate guide to the Red Planet
Quercus, 2014
Buku Referensi
Hayes, Denis
The Official earth day guide to planet repair
Island Press, 2000
Buku Teks