APA (7th ed.) Citation

De Viana, L. D. (2011). Smallpox vaccination in 19th century Manila. Journal of History.

Chicago Style (17th ed.) Citation

De Viana, Lorelei D.C. "Smallpox Vaccination in 19th Century Manila." Journal of History 2011.

MLA (9th ed.) Citation

De Viana, Lorelei D.C. "Smallpox Vaccination in 19th Century Manila." Journal of History, 2011.

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