Cita APA

Duncan, S., Scott, S., & Duncan, C. (1994). SMALLPOX EPIDEMICS IN CITIES IN BRITAIN.

Citación estilo Chicago

Duncan, S., S. Scott, and C. Duncan. SMALLPOX EPIDEMICS IN CITIES IN BRITAIN. 1994.

Cita MLA

Duncan, S., et al. SMALLPOX EPIDEMICS IN CITIES IN BRITAIN. 1994.