APA Citation

Fenner, F., & Fenner, F. (1988). Smallpox and its eradication. Geneva: World Health Organization.

Chicago Style Citation

Fenner, F., and F. Fenner. Smallpox and Its Eradication. Geneva: World Health Organization, 1988.

MLA Citation

Fenner, F., and F. Fenner. Smallpox and Its Eradication. Geneva: World Health Organization, 1988.

Warning: These citations may not always be 100% accurate.