Gaya APA
Olii, Helena. (2007).
Public speaking .
Jakarta:
Indeks.
Gaya Chicago
Olii, Helena.
Public speaking.
Jakarta:
Indeks,
2007.
Text.
Gaya MLA
Olii, Helena.
Public speaking.
Jakarta:
Indeks,
2007.
Text.
Gaya Turabian
Olii, Helena.
Public speaking.
Jakarta:
Indeks,
2007.
Print.