Duncan, S., Scott, S., & Duncan, C. (1994). SMALLPOX EPIDEMICS IN CITIES IN BRITAIN.
Lua i Stíl Chicago (17ú heag.)Duncan, S., S. Scott, agus C. Duncan. SMALLPOX EPIDEMICS IN CITIES IN BRITAIN. 1994.
Lua MLA (9ú heag.)Duncan, S., et al. SMALLPOX EPIDEMICS IN CITIES IN BRITAIN. 1994.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.