Raymer, Robert, author
Editions Didier Millet, 2011
Buku Referensi
Holland, Lorien, author
Periplus Editions , 2007
Buku Referensi
Raymer, Robert, author
Editions Didier Millet, 2010
Buku Referensi
Artikel Jurnal
Ryan, N.J
Oxford University Press, 1970
Buku Teks