Muhammad Arvid Suhada, examiner
A Traveller's guide to Pakistan / Hilary Adamson, Isobel Shaw
The Asian Study Group , 1981
 Buku Teks
The British Broadcasting Corporation(BBC) guide to parliament
British Broadcasting Corporation , 1979
 Buku Teks
Sparrow, Giles, 1970-
Mars : the ultimate guide to the Red Planet
Quercus, 2014
 Buku Referensi
Bouman, K. Herman
Forgotten gods : primitive mind from a traveller's point of view
E.J. Brill, 1949
 Buku Teks
Hayes, Denis
The Official earth day guide to planet repair
Island Press, 2000
 Buku Teks