Baker, A. David, author
West Publishing, 1992
Buku Teks
English, James, author
McGraw-Hill, 1956
Buku Teks
Volhardt, K. peter C
W.H. Freeman and Co. , 1999
Buku Teks
Griffin, Rodger W., author
McGraw-Hill, 1969
Buku Teks
Hart, Harold, 1922-, author
Houghton Miffiln, 1991
Buku Teks