Dyfyniad APA

Bärnighausen, T., Bloom, D. E., Cafiero-Fonseca, E. T., & O’Brien, J. C. (2014). Valuing vaccination. National Academy of Sciences.

Dyfyniad Arddull Chicago

Bärnighausen, Till, David E. Bloom, Elizabeth T. Cafiero-Fonseca, and Jennifer Carroll O’Brien. Valuing Vaccination. National Academy of Sciences, 2014.

Dyfyniad MLA

Bärnighausen, Till, David E. Bloom, Elizabeth T. Cafiero-Fonseca, and Jennifer Carroll O’Brien. Valuing Vaccination. National Academy of Sciences, 2014.

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