Gaya APA
Pramono, P, R.
(2007).
5 Giant Step to Successful Business writing
.
Yogyakarta:
Penerbit Andi.
Gaya MLA
Pramono, Peni, R.
"5 Giant Step to Successful Business writing".
Yogyakarta:
Penerbit Andi,
2007.
Text.