Moore, Raymond C., author
McGraw-Hill, 1952
Buku Teks
Ruppert, Edward E., author
Saunders College, 1994
Buku Teks
Tombes, A.S.
Academic Press, 1970
Buku Teks
The University of Chicago Press, 1987
Buku Teks
Russell-Hunter, W.D.
Macmillan Publishing Co., 1979
Buku Teks