Gaya APA
Ashton, Robert. (2005).
How to sell .
Jakarta:
Erlangga.
Gaya Chicago
Ashton, Robert.
How to sell.
Jakarta:
Erlangga,
2005.
Text.
Gaya MLA
Ashton, Robert.
How to sell.
Jakarta:
Erlangga,
2005.
Text.
Gaya Turabian
Ashton, Robert.
How to sell.
Jakarta:
Erlangga,
2005.
Print.