Gaya APA
Pascual, C., Elkind, J. (2010).
Energy Security : Economics, Politics, Strategies and Implications .
Washington DC:
Brookings Institution.
Gaya MLA
Pascual, Carlos., Elkind, Jonathan.
"Energy Security : Economics, Politics, Strategies and Implications".
Washington DC:
Brookings Institution,
2010.
Buku TP.