Dyfyniad APA

Williamson, S. (2007). The vaccination controversy: The rise, reign and fall of compulsory vaccination for smallpox. Liverpool University Press.

Dyfyniad Arddull Chicago

Williamson, Stanley. The Vaccination Controversy: The Rise, Reign and Fall of Compulsory Vaccination for Smallpox. Liverpool: Liverpool University Press, 2007.

Dyfyniad MLA

Williamson, Stanley. The Vaccination Controversy: The Rise, Reign and Fall of Compulsory Vaccination for Smallpox. Liverpool University Press, 2007.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.