एपीए उद्धरण

(1895). Vaccination and Small-Pox at Walsall in 1893-4. XVI.

शिकागो स्टाइल उद्धरण

Vaccination and Small-Pox At Walsall in 1893-4. XVI. 1895.

एमएलए उद्धरण

Vaccination and Small-Pox At Walsall in 1893-4. XVI. 1895.