Gaya APA
Bradt, G. (2007).
The Ring in The Rubble : Dig Through Change and Find your Next Golden Opportunity .
USA:
Mc Graw Hill.
Gaya MLA
Bradt, Gary.
"The Ring in The Rubble : Dig Through Change and Find your Next Golden Opportunity".
USA:
Mc Graw Hill,
2007.
Text.