Schafer, J.L.
Chapman & Hall, 1997
Buku Teks
Cooley, William W.
John Wiley & Sons, 1971
Buku Teks SO
Cooley, William W.
Robert E. Krieger, 1986
Buku Teks SO
Joseph F. Hair Jr., author; William C. Black, author; Barry J. Babin, author; Rolph E. Anderson, author
Pearson, 2014
Buku Teks SO
Kutyniok, Gitta, editor
[Springer, ], 2012
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