APA Style
Sung, Abraham. (2004).
323 Effective Business Letters (First).
selangor:
Minerva Publications.
Chicago Style
Sung, Abraham.
323 Effective Business Letters.
First
selangor:
Minerva Publications,
2004.
printed.
MLA Style
Sung, Abraham.
323 Effective Business Letters.
First
selangor:
Minerva Publications,
2004.
printed.
Turabian Style
Sung, Abraham.
323 Effective Business Letters.
First
selangor:
Minerva Publications,
2004.
printed.