ebrary, Inc, & Beltran, A. (2010). A comparative history of national oil companies. P.I.E. Peter Lang.
Chicago-čujuhus (17. p.)ebrary, Inc, juo Alain Beltran. A Comparative History of National Oil Companies. Bruxelles ; New York: P.I.E. Peter Lang, 2010.
MLA-čujuhus (9. p.)ebrary, Inc, juo Alain Beltran. A Comparative History of National Oil Companies. P.I.E. Peter Lang, 2010.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.