Spitzer, Harry, author
Harper & Row, 1982
Buku Teks
Boyd, Harper W., Jr., author
Prentice-Hall, 1967
Buku Teks
Brannen, William H.
Prentice-Hall, 1983
Buku Teks
Belch, George F., author
McGraw-Hill, Irwin, 2001
Buku Teks
Barban, Arnold M., author
Richard D. Irwin, 1968
Buku Teks