Zopf, Paul E.
Mayfield Publishing, 1984
Buku Teks
edited by D.V. Glass and D.E.C. Eversley
E. Arnold, 1965
Buku Teks
John Wiley & Sons, 1977
Buku Teks
Ford, Thomas R.
Prentice-Hall, 1970
Buku Teks
Bose, Ashish
University of North Carolina Press, 1972
Buku Teks SO