Kirk, A. (2000). A flier in oil: Adolph B. Spreckels and the rise of the California petroleum industry. San Francisco: California Historical Society.
শিকাগো স্টাইলে সাইটেশনKirk, Anthony. A Flier in Oil: Adolph B. Spreckels and the Rise of the California Petroleum Industry. San Francisco: California Historical Society, 2000.
এমএলএ সাইটেশনKirk, Anthony. A Flier in Oil: Adolph B. Spreckels and the Rise of the California Petroleum Industry. San Francisco: California Historical Society, 2000.
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