Herek, R. J. (1998). These men have seen hard service: The First Michigan Sharpshooters in the Civil War. Wayne State University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHerek, Raymond J. These Men Have Seen Hard Service: The First Michigan Sharpshooters in the Civil War. Detroit: Wayne State University Press, 1998.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHerek, Raymond J. These Men Have Seen Hard Service: The First Michigan Sharpshooters in the Civil War. Wayne State University Press, 1998.
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