Hirsch, Maurice I.
PWS-Kent , 1988
Buku Teks
Kaplan, Robert S., author
Prentice-Hall, 1989
Buku Teks
Nibbelin, Michael C., author
Prentice-Hall, 1996
Buku Teks
Riahi-Belkaoui, Ahmed, 1943-, author
Addison-Wesley, 1980
Buku Teks
edited by David Ashton, Trevor Hopper, Robert Scapens
Prentice-Hall, 1991
Buku Teks