Joy Hakim
Oxford University Press, 2003
Buku Teks
Bury, J.B.
Oxford University Press, 1913
Buku Teks
Ritchie, Donald A.
Macmillan, 1985
Buku Teks
edited by Keith Michael Baker, Steven Laurence Kaplan
Duke University Press, 1997
Buku Teks
Deutsch, Kenneth
Wadsworth and Cengage Learning, 2009
Buku Teks