Hirsch, Maurice I.
PWS-Kent , 1988
Buku Teks
Riahi-Belkaoui, Ahmed, 1943-
Addison-Wesley, 1980
Buku Teks
Arnold, John
Prenctice-Hall, 1983
Buku Teks
Nibbelin, Michael C.
Prentice-Hall, 1996
Buku Teks
edited by David Ashton, Trevor Hopper, Robert Scapens
Prentice-Hall, 1991
Buku Teks