Hasan, Sayed Mahmudul, author
Society for Pakistan Studies, 1970
Buku Teks
BBC Earth (Firm)
Lonely Planet, 2010
Buku Referensi
Hatt, John
Pan Books, 1982
Buku Teks
Stephens, Ian, author
Ernest Benn, 1963
Buku Teks
Witting, Amy
Penguin Books, 1989
Buku Teks