Não informado. Summary of operations, California oil fields. Department of Natural Resources, Division of Oil and Gas.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Summary of Operations, California Oil Fields. San Francisco, Calif: Department of Natural Resources, Division of Oil and Gas.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Summary of Operations, California Oil Fields. Department of Natural Resources, Division of Oil and Gas.
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