Gaya APA
Olii, Helena. (2013).
Public Speaking (2).
Jakarta:
Indeks.
Gaya Chicago
Olii, Helena.
Public Speaking.
2
Jakarta:
Indeks,
2013.
Text.
Gaya MLA
Olii, Helena.
Public Speaking.
2
Jakarta:
Indeks,
2013.
Text.
Gaya Turabian
Olii, Helena.
Public Speaking.
2
Jakarta:
Indeks,
2013.
Print.