Gaya APA
Bettger, F.
(1951).
How I Raised Myself from Failure to Success in Selling
.
Surrey:
The windmil press LTD.
Gaya MLA
Bettger, Frank.
"How I Raised Myself from Failure to Success in Selling".
Surrey:
The windmil press LTD,
1951.
Text.