1964
Buku Teks
Rodley, Lyn, author
Cambridge University Press, 1999
Buku Teks
Walsh, Linda, author
John Wiley & Sons, 2017
Buku Teks
Wichmann, Siegfried, author
Thames & Hudson, 1999
Buku Referensi
Abondolo, Daniel, author
Curzon, 2001
Buku Referensi