Ulrichsen, Kristian
Palgrave Macmillan, 2016
Buku Teks
Anderson, Martin
Hover Institution Press, 1978
Buku Teks
Ordeshook, Peter C.
Routledge, 1992
Buku Teks
Kotler, Philip
John Wiley & Sons (Asia), 2000
Buku Teks
Kotler, Philip
Salemba Empat , 2001
Buku Teks