Cita APA

Heaton, T. G. (1940). Purpura Associated with Vaccination Against Smallpox.

Chicago Style Citation

Heaton, T. G. Purpura Associated With Vaccination Against Smallpox. 1940.

Cita MLA

Heaton, T. G. Purpura Associated With Vaccination Against Smallpox. 1940.

Atenció: Aquestes cites poden no estar 100% correctes.