Dyfyniad APA

(1956). Experience of Poliomyelitis Vaccination in Eight Countries.

Dyfyniad Arddull Chicago

Experience of Poliomyelitis Vaccination in Eight Countries. 1956.

Dyfyniad MLA

Experience of Poliomyelitis Vaccination in Eight Countries. 1956.

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