APA (7 वां संस्करण) प्रशस्ति पत्र

Steffens, B. (2019). Gun violence and mass shootings. ReferencePoint Press.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Steffens, Bradley. Gun Violence and Mass Shootings. San Diego, CA: ReferencePoint Press, 2019.

एमएलए (8वां संस्करण) प्रशस्ति पत्र

Steffens, Bradley. Gun Violence and Mass Shootings. ReferencePoint Press, 2019.

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