edited by H. Hagen, D. Roller
Springer-Verlag, 1991
Buku Teks
Makridakis, Spyros G.
John Wiley & Sons, 1998
Buku Teks
Gross, Jonathan L.
Chapman & Hall/CRC Taylor & Francis Group, 2008
Buku Teks
edited by Miles J. Padgett, Justin E. Molloy, David McGloin
CRC Press, 2010
Buku Teks
Gass, Saul I.
Mc Graw Hill, 1975
Buku Teks