Gaya APA
Principles Of Economics 6th Edition. (2012).
Australia:
South-Western.
Gaya Chicago
Principles Of Economics 6th Edition.
.
Australia:
South-Western,
2012.
Buku.
Gaya MLA
Principles Of Economics 6th Edition.
.
Australia:
South-Western,
2012.
Buku.
Gaya Turabian
Principles Of Economics 6th Edition.
Australia:
South-Western,
2012.
Buku.