editor, Donald Watson
McGraw-Hill, 2000
Buku Referensi
Donald Watson, editor
McGraw-Hill, 2000
Buku Referensi
Ashby, Mike
Butterworth-Heinemann, 2014
eBooks
Ashby, Michael F.
Elsevier, 2014
Buku Teks
Fielding, John P.
Cambridge University Press, 1999
Buku Teks