Schafer, J.L., author
Chapman & Hall, 1997
Buku Teks
Ria Miranti, author
Fakultas Teknik Universitas Indonesia, 2006
UI - Skripsi (Membership)
Tabachnick, Barbara G., author
Allyn and Bacon, 2001
Buku Teks
Karson, Marvin J., author
Iowa State University Press, 1982
Buku Teks
Alley, Michael
Springer-Verlag, 1996
Buku Teks