Osborne, Milton E., author
Allen & Unwin, 2016
Buku Teks
Heidhues, Mary Somers
Thames dan Hudson , 2000
Buku Teks
Williams, Lea E.
Oxford University Press, Inc, 1976
Buku Teks
Progressio, 1972
Buku Teks
Reid, Anthony, 1939-, author
John Wiley & Sons, 2015
Buku Teks