Schafer, J.L.
Chapman & Hall, 1997
Buku Teks
Hardle, Wolfgang Karl
Springer , 2012
eBooks
Myers, Wayne L.
Springer, 2012
eBooks
Joseph F. Hair Jr., author; William C. Black, author; Barry J. Babin, author; Rolph E. Anderson, author
Pearson, 2014
Buku Teks
Mather, P.M.
John Wiley & Sons, 1976
Buku Teks