Howard, Joseph H.
University of Malaya Library, 1966
Buku Referensi
The University of Michigan, 1976
Buku Teks
Tokyo: University of Tokyo Press, 1974
Buku Teks
Ballantine, Joseph W.
Stanford University, 1945
Buku Teks
Bristol Gemini Graphic and Print , 1981
Buku Teks