(1)Audio English, 2006. <URL:> Accessed1 December, 2012.

(2)Campbell, N. A., Reece, J. B., Urry, L. A., Cain, M. L.,Wasserman, S. A., Minorsky, P. V., and Jackson, R. B. 2008. Biology, Eight Edition. Pearson Education, Inc., San Fransisco, California, USA. 487, 493, 551-552, 654, 698, 1223.

(3)Col, J. 1996-2010.  <URL:> Accessed 28 November, 2012.

(4)DIY Pest Control, 2012. <URL:> Accessed 1, 2012.

(5) Hanson, A. F. 2010.  <URL:> Accessed 29 November, 2012.

(6)Jung, T. S., Nagorsen, D. W., and Barker, O. E. 2011.  "First Record of a Brown Rat (Rattus Norvegicus) From the Yukon". Northwestern Naturalist, 92:2, 131-132.

(7)Knockout Pest Control Services, 2012. <URL:> Accessed 1 December, 2012.

(8)Lambert, M. S., Quy, R. J., Smith, R. H., and Cowan, D. P. 2008.  "The effect of habitat management on home-range size and survival of rural Norway rat populations." Journal of Applied Ecology, 45:6, 1753-1761.

(9)Lentini, L. and Mouzon, D. 2006.  "20 Things you didn't know about Rats." Kalmbach Publishing Company, 1.

(10)Looney, C.  2011.  "Observations of a Brown Rat (Rattus norvegicus) Attacking a Townsend's Chipmunk (Tamisa townsendit)". Northwestern Naturalist, 92:3, 237-238.

(11)Mid-continent Research for Education and Learning, 2000. <URL:> Accessed 1 December, 2012.

(12)Petrovici, S., Trif, A., Petrovici, M., Dumitrescu, E., Olariu, L., Tulcan, C., and Ghise, A. 2010. "Effect of potassium dichromate intake on feed intake and body weight, in female rats, Rattus norvegicus (exposure on three generations)". Human & Veterinary Medicine, 2:1, 31-35.

(13)Vadell, M., Cavia, R., & Suarez, O. V. 2010. "Abundance, age structure, and reproductive patterns of Rattus norvegicus and Mus musculus in two areas of the city of Buenos Aires." International Journal of Pest Management, 56:4, 327-336.

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