Gaya APA
Executive's Complete Portfolio Of Business Letters. (2002).
:
Pustaka Referensia Utama.
Gaya Chicago
Executive's Complete Portfolio Of Business Letters.
Cet.3.
:
Pustaka Referensia Utama,
2002.
Text.
Gaya MLA
Executive's Complete Portfolio Of Business Letters.
Cet.3.
:
Pustaka Referensia Utama,
2002.
Text.
Gaya Turabian
Executive's Complete Portfolio Of Business Letters.
:
Pustaka Referensia Utama,
2002.
Print.