Chalk, P. (2004). Hitting America's soft underbelly: The potential threat of deliberate biological attacks against the U.S. agricultural and food industry. Rand Corporation.
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Chicago Style (17th ed.) Zitazioa
Chalk, Peter. Hitting America's Soft Underbelly: The Potential Threat of Deliberate Biological Attacks Against the U.S. Agricultural and Food Industry. Santa Monica, CA: Rand Corporation, 2004.
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MLA (9th ed.) Zitazioa
Chalk, Peter. Hitting America's Soft Underbelly: The Potential Threat of Deliberate Biological Attacks Against the U.S. Agricultural and Food Industry. Rand Corporation, 2004.
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Kontuz: berrikusi erreferentzia hauek erabili aurretik.