Dyfyniad APA

Journal of the Royal Institute of Public Health. Oxford University Press.

Dyfyniad Arddull Chicago

Journal of the Royal Institute of Public Health. Oxford University Press.

Dyfyniad MLA

Journal of the Royal Institute of Public Health. Oxford University Press.

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