APA (7 वां संस्करण) प्रशस्ति पत्र

Walker, S. (1992). The police in America: An introduction (2nd ed.). McGraw-Hill.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Walker, Samuel. The Police in America: An Introduction. 2nd ed. New York: McGraw-Hill, 1992.

एमएलए (8वां संस्करण) प्रशस्ति पत्र

Walker, Samuel. The Police in America: An Introduction. 2nd ed. McGraw-Hill, 1992.