Gaya APA
Rahardi, K., Ransus, F. (2009).
Communicative English for office staff and administrative assistants .
Depok:
Gramata.
Gaya MLA
Rahardi, Kunjana., Ransus, Fransiskus.
"Communicative English for office staff and administrative assistants".
Depok:
Gramata,
2009.
Buku Tercetak.