Gaya APA
Annual Editions: Economics 2000/2001. (2000).
Guiford:
Mc Graw Hill.
Gaya Chicago
Annual Editions: Economics 2000/2001.
.
Guiford:
Mc Graw Hill,
2000.
Buku.
Gaya MLA
Annual Editions: Economics 2000/2001.
.
Guiford:
Mc Graw Hill,
2000.
Buku.
Gaya Turabian
Annual Editions: Economics 2000/2001.
Guiford:
Mc Graw Hill,
2000.
Buku.