Gaya APA
Crom, Michael. (2003).
THE SALES ADVANTAGE .
Jakarta:
PT ESENSI.
Gaya Chicago
Crom, Michael.
THE SALES ADVANTAGE.
Jakarta:
PT ESENSI,
2003.
Text.
Gaya MLA
Crom, Michael.
THE SALES ADVANTAGE.
Jakarta:
PT ESENSI,
2003.
Text.
Gaya Turabian
Crom, Michael.
THE SALES ADVANTAGE.
Jakarta:
PT ESENSI,
2003.
Print.