Trautz, F.M.
Munchen Muller 1926
Buku Teks
Arasartnam, Sinnappah
Prentice-Hall, 1964
Buku Teks
Bailey, Sydney D.
William Brendon ans Son, 1952
Buku Teks
Brohier, R.L.
Lake House Investments, 1971
Buku Teks
Frampton, Kenneth
Thames and Hudson, 1992
Buku Teks