Gaya APA
Business letters for busy people. (2002).
United State of America:
National Press Publications.
Gaya Chicago
Business letters for busy people.
.
United State of America:
National Press Publications,
2002.
Electronic Resource.
Gaya MLA
Business letters for busy people.
.
United State of America:
National Press Publications,
2002.
Electronic Resource.
Gaya Turabian
Business letters for busy people.
United State of America:
National Press Publications,
2002.
Electronic Resource.