Gaya APA
Model Business Letters, E-mails & Other Business Documents. (2004).
UK:
.
Gaya Chicago
Model Business Letters, E-mails & Other Business Documents.
Ed.6, Cet.1.
UK:
,
2004.
.
Gaya MLA
Model Business Letters, E-mails & Other Business Documents.
Ed.6, Cet.1.
UK:
,
2004.
.
Gaya Turabian
Model Business Letters, E-mails & Other Business Documents.
UK:
,
2004.
.