APA Style
Olii, Helena. (2010).
Public Speaking .
Jakarta:
Indeks.
Chicago Style
Olii, Helena.
Public Speaking.
Jakarta:
Indeks,
2010.
Buku.
MLA Style
Olii, Helena.
Public Speaking.
Jakarta:
Indeks,
2010.
Buku.
Turabian Style
Olii, Helena.
Public Speaking.
Jakarta:
Indeks,
2010.
Buku.