Gaya APA
RAHARDI, K.
(2009).
COMMUNICATIVE ENGLISH FOR SECRETARIES
.
YOQJAKARTA:
PUSTAKA BOOK PUBLISER.
Gaya MLA
RAHARDI, KUNJANA.
"COMMUNICATIVE ENGLISH FOR SECRETARIES".
YOQJAKARTA:
PUSTAKA BOOK PUBLISER,
2009.
.