Cooper, J. I. (1995). Viruses and the environment (2nd ed.). Chapman & Hall.
Dyfyniad Arddull ChicagoCooper, J. I. Viruses and the Environment. 2nd ed. London: Chapman & Hall, 1995.
Dyfyniad MLACooper, J. I. Viruses and the Environment. 2nd ed. Chapman & Hall, 1995.
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