APA Style
Olli, Helena. (2007).
Public Speaking .
Jakarta:
PT. Indeks.
Chicago Style
Olli, Helena.
Public Speaking.
Jakarta:
PT. Indeks,
2007.
Buku Penunjang.
MLA Style
Olli, Helena.
Public Speaking.
Jakarta:
PT. Indeks,
2007.
Buku Penunjang.
Turabian Style
Olli, Helena.
Public Speaking.
Jakarta:
PT. Indeks,
2007.
Buku Penunjang.