Keegan, Warren J., author
Prenhallindo , 1996
Buku Teks
Keegan, Warren J., author
Alex Media Komputindo, 1992
Buku Teks
Keegan, Warren J., author
Prehallindo , 1995
Buku Teks
Keegan, Warren J., author
Alex Media Komputindo, 1992
Buku Teks
Kotler, Philip, author
Erlangga, 2009
Buku Teks