O'Keefe, E. (2018). Eyewitness to the assassination of Archduke Francis Ferdinand. The Child's World.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रO'Keefe, Emily. Eyewitness to the Assassination of Archduke Francis Ferdinand. Mankato, MN: The Child's World, 2018.
एमएलए (8वां संस्करण) प्रशस्ति पत्रO'Keefe, Emily. Eyewitness to the Assassination of Archduke Francis Ferdinand. The Child's World, 2018.
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