Cita APA (7th ed.)
ebrary, Inc, & Beltran, A. (2010). A comparative history of national oil companies. P.I.E. Peter Lang.
Cita Chicago (17th ed.)
ebrary, Inc, i Alain Beltran. A Comparative History of National Oil Companies. Bruxelles ; New York: P.I.E. Peter Lang, 2010.
Cita MLA (9th ed.)
ebrary, Inc, i Alain Beltran. A Comparative History of National Oil Companies. P.I.E. Peter Lang, 2010.
Atenció: Aquestes cites poden no estar 100% correctes.