Weske, Mathias
Springer, 2007
Buku Teks
Hutt, Michael D., author
South Western Cengage Learning, 2013
Buku Teks
Hatten, Timothy S., author
South Western Cengage Learning, 2012
Buku Teks
Harper & Row, 1975
Buku Teks
Kurian, George Thomas, author
Amacom, 2013
Buku Referensi