Wills, Adele, author
Routledge, 2004
Buku Teks
Potter, David Stone, author
Routledge, 1999
Buku Teks
Davies, Howard, author
Butterworth, 1991
Buku Teks
Lloyd, Dennis, author
Frederick A. Praeger, 1959
Buku Teks
edited by Edward Conze
Bruno Cassirer, 1954
Buku Teks