Lowenfeld, Andreas F., author
Matthew Bender, 1982
Buku Teks
edited by James Daniel
McGraw-Hill, 1958
Buku Teks
Cheshire, G. C.
At The Clarendon Press, 1952
Buku Teks
Morris, J.H.C.
At The Clarendon Press, 1960
Buku Teks
Wolf, Martin, author
The Clarendon Press, 1950
Buku Teks