Colbeck, John
Watson-Guptill, 1969
Buku Teks SO
Chaffers, W.M.
Borden, 1946
Buku Referensi
Morley-Fletcher, Hugo, editor
Chartwell Book, 1997
Buku Referensi
Cosentino, Peter
Page one , 2003
Buku Referensi
Wu, Chin-ting
Pub. on behalf of the Courtauld Institute of Art, University of London, 1938
Buku Teks SO