National Academy Press, 1996
Buku Teks
Makridakis, Spyros G., author
The Free Press, 1990
Buku Teks
Niles, Spencer G., author
Pearson, 2013
Buku Teks
Friis, Robert H., author
Jones & Bartlett Learning, 2016
Buku Teks
Gesker, Ronald D., author
2020:Marketing Communications LLC, 2015
Buku Teks