Turtledove, H. (2002). Counting up, counting down (first.). Ballantine books.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रTurtledove, Harry. Counting Up, Counting Down. first. New York: Ballantine books, 2002.
एमएलए (9वां संस्करण) प्रशस्ति पत्रTurtledove, Harry. Counting Up, Counting Down. first. Ballantine books, 2002.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.