Gaya APA
The Economy Today. (sa).
Boston:
Mc Graw Hill.
Gaya Chicago
The Economy Today.
9th.
Boston:
Mc Graw Hill,
sa.
Buku.
Gaya MLA
The Economy Today.
9th.
Boston:
Mc Graw Hill,
sa.
Buku.
Gaya Turabian
The Economy Today.
Boston:
Mc Graw Hill,
sa.
Buku.