Gaya APA
Allora, Ralph. (2009).
Winning sales letters from prospect to close .
United State of America:
McGraw Hill.
Gaya Chicago
Allora, Ralph.
Winning sales letters from prospect to close.
United State of America:
McGraw Hill,
2009.
Buku.
Gaya MLA
Allora, Ralph.
Winning sales letters from prospect to close.
United State of America:
McGraw Hill,
2009.
Buku.
Gaya Turabian
Allora, Ralph.
Winning sales letters from prospect to close.
United State of America:
McGraw Hill,
2009.
Buku.