Gaya APA
O`quinn, Ken. (2006).
Perfect Phrases for Business Letters .
United States of America:
McGraw-Hill.
Gaya Chicago
O`quinn, Ken.
Perfect Phrases for Business Letters.
United States of America:
McGraw-Hill,
2006.
Text.
Gaya MLA
O`quinn, Ken.
Perfect Phrases for Business Letters.
United States of America:
McGraw-Hill,
2006.
Text.
Gaya Turabian
O`quinn, Ken.
Perfect Phrases for Business Letters.
United States of America:
McGraw-Hill,
2006.
Print.