APA-referens (7:e uppl.)

ebrary, Inc, & Beltran, A. (2010). A comparative history of national oil companies. P.I.E. Peter Lang.

Chicago-referens (17:e uppl.)

ebrary, Inc, och Alain Beltran. A Comparative History of National Oil Companies. Bruxelles ; New York: P.I.E. Peter Lang, 2010.

MLA-referens (9:e uppl.)

ebrary, Inc, och Alain Beltran. A Comparative History of National Oil Companies. P.I.E. Peter Lang, 2010.