Barnard, B. (2009). Outbreak!: Plagues that changed history.
Cita Chicago Style (17a ed.)Barnard, Bryn. Outbreak!: Plagues That Changed History. 2009.
Cita MLA (8a ed.)Barnard, Bryn. Outbreak!: Plagues That Changed History. 2009.
Precaución: Estas citas no son 100% exactas.