Gaya APA
E.Clayton,-et.al, G. (2010).
A GUIDE TO EVERYDAY ECONOMIC STATISTIC (7th).
Kentucky:
McGraw-Hill Book Company.
Gaya MLA
E.Clayton,-et.al, Gary.
"A GUIDE TO EVERYDAY ECONOMIC STATISTIC".
7th
Kentucky:
McGraw-Hill Book Company,
2010.
Textbook.