Duffie, Darrell
California Academic Press, 1988
Buku Teks
Duffie, Darrel
Prentice-Hall, 1989
Buku Teks
Nichols, Randall K., author
McGraw-Hill , 2002
Buku Teks
Miller, Darrell A.
McGraw-Hill, 1984
Buku Teks
Ebbing, Darrell D.
Houghton Miffiln, 1987
Buku Teks