Holdsworth, Roger F., author
Brithis Institute of Management, 1972
Buku Teks
Lansdown, A.R., author
Pergamon Press, 1982
Buku Referensi
Stapleton, Gerald F., author
Tab Books, 1971
Buku Referensi
Eadie, Donald, author
Prentice-Hall, 1982
Buku Referensi
Ward, Brice, author
Blue Ridge Summit TAB Books , 1971
Buku Teks