(1989). Caltex and the community (2nd ed.). Corporate Relations Group.
Čikaški stil citiranja (17. izdanje)Caltex and the Community. 2nd ed. [S.l.]: Corporate Relations Group, 1989.
MLA način citiranja (9. izdanje)Caltex and the Community. 2nd ed. Corporate Relations Group, 1989.
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