Chaplin, J.P., author
Rajawali, 2011
Buku Referensi
S. Richard Sauber, Luciano L' Abate, Gerald R. Weeks, William L. Buchanan
Sage, 1993
Buku Referensi
Buku Teks
London: Tiger Books International, 1994,
Buku Referensi
Watson, Donald, author
Andre Deutsch, 1995
Buku Referensi