Sastri, K.A. Nilakanta
A history of South India : from prehistoric times to the fall of Vijayanagar
Oxford University Press, 1958
 Buku Teks
Dworkin, Ronald
Law`s empire
Harvard University Press, 1986
 Buku Teks
Dworkin, Ronald
Law's empire
Fontana Press, 1991
 Buku Teks
Ohara, Daniel T
Empire burlesque
Duke University Press, 2003
 Buku Teks
Vidal, Gore
Empire : a novel
Random House, 1987
 Buku Teks