Ghista, Dhanjoo N., author
CRC Press, 2009
Buku Teks
Walker, Keith M., author
Reston Publishing, 1984
Buku Teks
Wright, Samson, author
Oxford University Press, 1928
Buku Referensi
Wright, Samson, author
Oxford University Press, 1940
Buku Referensi
Wright, Samson, author
Oxford University Press, 1931
Buku Referensi