Oachs, E. R. (2018). The 12 most influential inventions of all time. 12 Story Library.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रOachs, Emily Rose. The 12 Most Influential Inventions of All Time. Mankato, MN: 12 Story Library, 2018.
एमएलए (8वां संस्करण) प्रशस्ति पत्रOachs, Emily Rose. The 12 Most Influential Inventions of All Time. 12 Story Library, 2018.
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