Lapworth, Phil, author
Sage Publications, 2004
Buku Teks
Andi Mappiare A.T., author
RajaGrafindo Persada, 2004
Buku Teks
Strong, Stanley R., author
John Wiley & Sons, 1982
Buku Teks
Brammer, Lawrence M., author
Prentice-Hall, 1982
Buku Teks
Arbuckle, Dugald S., author
Allyn and Bacon, 1961
Buku Teks