Gaya APA
Ruffin, Roy J, Gregory, Paul R. (1983).
Principles of macroeconomics .
Glenview:
Scott, Foresman.
Gaya Chicago
Ruffin, Roy J, Gregory, Paul R.
Principles of macroeconomics.
Glenview:
Scott, Foresman,
1983.
Buku.
Gaya MLA
Ruffin, Roy J, Gregory, Paul R.
Principles of macroeconomics.
Glenview:
Scott, Foresman,
1983.
Buku.
Gaya Turabian
Ruffin, Roy J, Gregory, Paul R.
Principles of macroeconomics.
Glenview:
Scott, Foresman,
1983.
Buku.