Gaya APA
Olii, Helena. (2008).
Public Speaking .
Jakarta:
Indeks.
Gaya Chicago
Olii, Helena.
Public Speaking.
Jakarta:
Indeks,
2008.
Text.
Gaya MLA
Olii, Helena.
Public Speaking.
Jakarta:
Indeks,
2008.
Text.
Gaya Turabian
Olii, Helena.
Public Speaking.
Jakarta:
Indeks,
2008.
Print.