Wagner, H. R. (1926). Sir Francis Drake's voyage around the world: Its aims and achievements. J. Howell.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWagner, Henry R. Sir Francis Drake's Voyage Around the World: Its Aims and Achievements. San Francisco, Calif.: J. Howell, 1926.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWagner, Henry R. Sir Francis Drake's Voyage Around the World: Its Aims and Achievements. J. Howell, 1926.
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