Gaya APA
Principles of macro economics. (2004).
Boston:
Mc Graw Hill.
Gaya Chicago
Principles of macro economics.
2nd.
Boston:
Mc Graw Hill,
2004.
Buku.
Gaya MLA
Principles of macro economics.
2nd.
Boston:
Mc Graw Hill,
2004.
Buku.
Gaya Turabian
Principles of macro economics.
Boston:
Mc Graw Hill,
2004.
Buku.