Works Cited
Reece, J. B., Urry, L. A., Cain, M. L., Wasserman, S. A., Minorsky, P. V., &
Jackson, R. B. (2011). Campbell biology (9th ed.). San Francisco, CA:
Pearson.
Types of prion disease. (n.d.). Retrieved February 26, 2014, from
http://memory.ucsf.edu/cjd/overview/types
Jackson, R. B. (2011). Campbell biology (9th ed.). San Francisco, CA:
Pearson.
Types of prion disease. (n.d.). Retrieved February 26, 2014, from
http://memory.ucsf.edu/cjd/overview/types