Miro, Carmen A.
Frances Pinter Publ., 1980
Buku Teks
Cammack, Paul Anthony, author
Leicester University Press, 1997
Buku Teks
edited by G.K. Helleiner
Routledge, 1995
Buku Teks
Euromonitor, 1989
Buku Teks
Gould, W.T.S., author
John Wiley, Longman Scientific, 1993
Buku Teks