Não informado. Summary of operations, California oil fields. Department of Natural Resources, Division of Oil and Gas.
Čikaški stil citiranja (17. izdanje)Não informado. Summary of Operations, California Oil Fields. San Francisco, Calif: Department of Natural Resources, Division of Oil and Gas.
MLA način citiranja (8. izdanje)Não informado. Summary of Operations, California Oil Fields. Department of Natural Resources, Division of Oil and Gas.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.