Savage, Donald T.
John Wiley & Sons, 1977
Buku Teks
Sampson, Anthony
Coronet Books, 1982
Buku Teks
Smith, Roy C.
Oxford University Press, 1997
Buku Teks
Proctor, Charles
Oxford University Press, 2015
Buku Teks
Canals, Jordi
Oxford University Press , 1997
Buku Teks