Fennelly, L. J. (2013). Effective physical security (4th ed.). Butterworth-Heinemann.
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Dyfyniad Arddull Chicago
Fennelly, Lawrence J. Effective Physical Security. 4th ed. Waltham, Mass.: Butterworth-Heinemann, 2013.
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Dyfyniad MLA
Fennelly, Lawrence J. Effective Physical Security. 4th ed. Butterworth-Heinemann, 2013.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.