Gaya APA
Sirait, Charles Bonar. (2015).
Public Speaking and Business .
Jakarta:
Elex Media Komputindo.
Gaya Chicago
Sirait, Charles Bonar.
Public Speaking and Business.
Jakarta:
Elex Media Komputindo,
2015.
Text.
Gaya MLA
Sirait, Charles Bonar.
Public Speaking and Business.
Jakarta:
Elex Media Komputindo,
2015.
Text.
Gaya Turabian
Sirait, Charles Bonar.
Public Speaking and Business.
Jakarta:
Elex Media Komputindo,
2015.
Print.