Hardle, Wolfgang Karl, author
Springer, 2012
eBooks
Cooley, William W., author
Robert E. Krieger, 1986
Buku Teks
Karson, Marvin J., author
Iowa State University Press, 1982
Buku Teks
Budi Santosa, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 1992
UI - Tesis (Membership)
Bishop, Yvonne M.M., author
MIT Press, 1975
Buku Teks