Krzanowski, W.J., author
An East Gate Book, 1999
Buku Teks
Raykov, Tenko, author
Routledge, Taylor & Francis Group, 2008
Buku Teks
Tabachnick, Barbara G., author
Allyn and Bacon, 2001
Buku Teks
Cooley, William W., author
John Wiley & Sons, 1971
Buku Teks
Hardle, Wolfgang Karl, author
Springer, 2012
eBooks