Gaya APA
Purwanto, Djoko. (2007).
Korespondensi Bisnis Modern .
:
Erlangga.
Gaya Chicago
Purwanto, Djoko.
Korespondensi Bisnis Modern.
:
Erlangga,
2007.
Book.
Gaya MLA
Purwanto, Djoko.
Korespondensi Bisnis Modern.
:
Erlangga,
2007.
Book.
Gaya Turabian
Purwanto, Djoko.
Korespondensi Bisnis Modern.
:
Erlangga,
2007.
Book.