Gaya APA
Berkowitz, Eric N (et.al). (1992).
Marketing (3 rd. Ed).
USA:
Irwin.
Gaya Chicago
Berkowitz, Eric N (et.al).
Marketing.
3 rd. Ed
USA:
Irwin,
1992.
Text.
Gaya MLA
Berkowitz, Eric N (et.al).
Marketing.
3 rd. Ed
USA:
Irwin,
1992.
Text.
Gaya Turabian
Berkowitz, Eric N (et.al).
Marketing.
3 rd. Ed
USA:
Irwin,
1992.
Print.