Gaya APA
Muckian, M., Woods, J.
(2006).
Buku pintar surat - surat bisnis
.
Yogyakarta:
Think Jogjakarta.
Gaya MLA
Muckian, Michael., Woods, John.
"Buku pintar surat - surat bisnis".
Yogyakarta:
Think Jogjakarta,
2006.
Sekretari D3.