Gaya APA
Ryans, Jhon K.. (1967).
World Marketing .
USA:
Jhon Wely.
Gaya Chicago
Ryans, Jhon K..
World Marketing.
USA:
Jhon Wely,
1967.
Text.
Gaya MLA
Ryans, Jhon K..
World Marketing.
USA:
Jhon Wely,
1967.
Text.
Gaya Turabian
Ryans, Jhon K..
World Marketing.
USA:
Jhon Wely,
1967.
Print.