Gaya APA
Improve Your Communication Skills. (2004).
Jakarta:
Pt Elex Media Komputindo.
Gaya Chicago
Improve Your Communication Skills.
.
Jakarta:
Pt Elex Media Komputindo,
2004.
.
Gaya MLA
Improve Your Communication Skills.
.
Jakarta:
Pt Elex Media Komputindo,
2004.
.
Gaya Turabian
Improve Your Communication Skills.
Jakarta:
Pt Elex Media Komputindo,
2004.
.