edited by Stephen N. Hay; Margaret H. Case
Frederick A. Praeger, 1962
Buku Teks
Gunther, John, 1901-1970
Hamish Hamilton, 1939
Buku Referensi
Vickers, Adrian, author
Cambridge University Press, 2010
Buku Teks
Heidhues, Mary Somers
Thames dan Hudson , 2000
Buku Teks
Osborne, Milton, author
Allen& Unwin , 2000
Buku Teks