compiled and edited By David Ewen
H.W. Wilson, 1962
Buku Teks
Tyson, Lois, 1950-, author
Routledge, 2006
Buku Teks
Vicki Smith, Patrizia Collard, Paula Nicolson, Rowan Bayne
Mc Graw-Hill, 2012
Buku Teks
Irwanto
Koalisi Nasional, 2008
Buku Teks
Ballou, Ronald H.
Prentice-Hall, 1973
Buku Teks