Helmus, T. C., York, E., & Chalk, P. (2013). Promoting online voices for countering violent extremism. Rand Corp..
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Citação norma Chicago
Helmus, Todd C., Erin York, and Peter Chalk. Promoting Online Voices for Countering Violent Extremism. [Santa Monica, Calif.]: Rand Corp., 2013.
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Citação norma MLA
Helmus, Todd C., et al. Promoting Online Voices for Countering Violent Extremism. Rand Corp., 2013.
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Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.