Newman, Maurice S.
John Wiley & Sons, 1982
Buku Teks
Wohl, Gerald
Richard D. Irwin , 1965
Buku Teks
Chambers, Andrew D., author
Pitman, 1987
Buku Teks
Bodnar, George H., author
Prentice Hall International, 1995
Buku Teks
Sweeney, Robert B., author
Prentice-Hall, 1971
Buku Teks