Penrose, S. B. L. (1925). Sky-piloting in a pioneer farming town. Washington farmer.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPenrose, Stephen Beasley Linnard. Sky-piloting in a Pioneer Farming Town. [Dayton? Wash.: Washington farmer, 1925.
एमएलए (8वां संस्करण) प्रशस्ति पत्रPenrose, Stephen Beasley Linnard. Sky-piloting in a Pioneer Farming Town. Washington farmer, 1925.
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