Não informado. Studies from the Connaught Medical Research Laboratories and School of Hygiene. University of Toronto.
Citação do estilo Chicago (17ª ed.)Não informado. Studies from the Connaught Medical Research Laboratories and School of Hygiene. Toronto, Canada: University of Toronto.
Citação MLA (8ª ed.)Não informado. Studies from the Connaught Medical Research Laboratories and School of Hygiene. University of Toronto.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.