Saunders, E. Dale, author
University of Pennsylvania, 1964
Buku Teks
Hutton, J.H.
Cambridge University Press , 1946
Buku Teks
Ward, C.H.S
The Epworth Press, 1934
Buku Teks
Saunders, Kay
University of Queensland Press, 1982
Buku Teks
Pastoureau, Michael
London Thames and Hudson 1997
Buku Teks