APA (7 वां संस्करण) प्रशस्ति पत्र
Zick, T. (2009). Speech out of doors: Preserving First Amendment liberties in public places. Cambridge University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Zick, Timothy. Speech Out of Doors: Preserving First Amendment Liberties in Public Places. Cambridge ; New York: Cambridge University Press, 2009.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Zick, Timothy. Speech Out of Doors: Preserving First Amendment Liberties in Public Places. Cambridge University Press, 2009.
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