Purpura, P. P. (2007). Terrorism and homeland security: An introduction with applications. Amsterdam,Boston: Butterworth-Heinemann.
शिकागो स्टाइल उद्धरणPurpura, Philip P. Terrorism and Homeland Security: An Introduction With Applications. Amsterdam,Boston: Butterworth-Heinemann, 2007.
एमएलए उद्धरणPurpura, Philip P. Terrorism and Homeland Security: An Introduction With Applications. Amsterdam,Boston: Butterworth-Heinemann, 2007.
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