Cox, C. Barry, author
John Wiley & Sons, 2010
Buku Teks
Tivy, Joy, author
Longman Scientific & Technical, 1993
Buku Teks
Briggs, J. C.
Elsevier, 1987
Buku Teks
Humphries, Christopher J., author
Clarendon Press, 1986
Buku Teks
Oxford University Press, 1986
Buku Teks