Gaya APA
Grolier Business Library:Writing Business Letters. (2005).
[s.l.]:
[s.n.].
Gaya Chicago
Grolier Business Library:Writing Business Letters.
.
[s.l.]:
[s.n.],
2005.
Text.
Gaya MLA
Grolier Business Library:Writing Business Letters.
.
[s.l.]:
[s.n.],
2005.
Text.
Gaya Turabian
Grolier Business Library:Writing Business Letters.
[s.l.]:
[s.n.],
2005.
Print.