edited by Victor Lazzaro
Prentice-Hall, 1968
Buku Referensi
Harmon, Paul
John Wiley & Sons, 1990
Buku Teks
Prerau, David S., author
Addison-Wesley, 1990
Buku Teks
Oxford University Press, 2014
Buku Teks
Gary L. Lilien, editor
Edward Elgar, 2012
Buku Teks