Gaya APA
Barker,Alan. (2004).
Improve Your Communication Skills .
Jakarta:
Elex Media Komputindo.
Gaya Chicago
Barker,Alan.
Improve Your Communication Skills.
Jakarta:
Elex Media Komputindo,
2004.
Text.
Gaya MLA
Barker,Alan.
Improve Your Communication Skills.
Jakarta:
Elex Media Komputindo,
2004.
Text.
Gaya Turabian
Barker,Alan.
Improve Your Communication Skills.
Jakarta:
Elex Media Komputindo,
2004.
Print.