McCully, C. Harold, author
Burgess, 1969
Buku Teks
Victorian Association for the Teaching of English, 1984
Buku Teks
United Health Foundation
BMJ Publishing Group, 2000
Buku Teks
Rothwell, Donald R
The Federation Press, 1997
Buku Teks
Longenecker, Martha W., editor
Mingei International Museum, 2005
Buku Referensi