Não informado. (1964). Journal of the Institute of Health Education. Institute of Health Education.
Citação do estilo Chicago (17ª ed.)Não informado. Journal of the Institute of Health Education. Sheffield, Inglaterra: Institute of Health Education, 1964.
Citação MLA (8ª ed.)Não informado. Journal of the Institute of Health Education. Institute of Health Education, 1964.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.