Gaya APA
Olii,Helena. (2008).
Public Speaking (Cet.3).
Jakarta:
Indeks.
Gaya Chicago
Olii,Helena.
Public Speaking.
Cet.3
Jakarta:
Indeks,
2008.
Text.
Gaya MLA
Olii,Helena.
Public Speaking.
Cet.3
Jakarta:
Indeks,
2008.
Text.
Gaya Turabian
Olii,Helena.
Public Speaking.
Cet.3
Jakarta:
Indeks,
2008.
Print.