McDowell, W. H., author
Longman, 2002
Buku Teks
Garraghan, Gilbert J., author
Fordham University Press, 1957
Buku Teks
Wolfe, Nancy Hatch
The Afghan Tourist Organization , 1965
Buku Teks
Brundage, Anthony, 1938-, author
John Wiley & Sons, Inc., 2018
Buku Teks
Library Association Publishing, 1994
Buku Referensi