Gormley, F. J., Little, C. L., Chalmers, R. M., Rawal, N., & Adak, G. K. (2011). Zoonotic Cryptosporidiosis from Petting Farms, England and Wales, 1992–2009. Centers for Disease Control and Prevention.

Gormley, Fraser J., Christine L. Little, Rachel M. Chalmers, Nalini Rawal, ja Goutam K. Adak. Zoonotic Cryptosporidiosis From Petting Farms, England and Wales, 1992–2009. Centers for Disease Control and Prevention, 2011.

Gormley, Fraser J., et al. Zoonotic Cryptosporidiosis From Petting Farms, England and Wales, 1992–2009. Centers for Disease Control and Prevention, 2011.