Gaya APA
Model business letters e-mails & other business documents. (1971).
:
Pearson education.
Gaya Chicago
Model business letters e-mails & other business documents.
.
:
Pearson education,
1971.
.
Gaya MLA
Model business letters e-mails & other business documents.
.
:
Pearson education,
1971.
.
Gaya Turabian
Model business letters e-mails & other business documents.
:
Pearson education,
1971.
.