Gaya APA
Rahardi, R, K., Indrojiono, F. (2007).
Communicative english for business and public relations services .
Yogyakarta:
Amara Books.
Gaya MLA
Rahardi, R., Kunjana., Indrojiono, F.X..
"Communicative english for business and public relations services".
Yogyakarta:
Amara Books,
2007.
Text.