Grant, Michael
Routledge, 1999
Buku Teks
Christopher Bayly, editor
acts On File Book, 1989
Buku Referensi
Emerson, Rupert, author
Harvard Univ. Press, 1960
Buku Teks
Dallin, David J
Hollis ,
Buku Teks
edited by Ray Laurence, Joanne Berry
Routledge, 1998
Buku Teks