Gaya APA
Barro, Robert J., Martin, Xavier Sala i. (2004).
Economic Growth (Second Edition) .
United States of America:
Massachussets Institute of Technology.
Gaya Chicago
Barro, Robert J., Martin, Xavier Sala i.
Economic Growth (Second Edition).
United States of America:
Massachussets Institute of Technology,
2004.
Text.
Gaya MLA
Barro, Robert J., Martin, Xavier Sala i.
Economic Growth (Second Edition).
United States of America:
Massachussets Institute of Technology,
2004.
Text.
Gaya Turabian
Barro, Robert J., Martin, Xavier Sala i.
Economic Growth (Second Edition).
United States of America:
Massachussets Institute of Technology,
2004.
Print.