Não informado. The Sight-saving Review. National Society for the Prevention of Blindness.
Chicago (17e ed.) BronvermeldingNão informado. The Sight-saving Review. New York: National Society for the Prevention of Blindness.
MLA (8e ed.) BronvermeldingNão informado. The Sight-saving Review. National Society for the Prevention of Blindness.
Let op: Deze citaties zijn niet altijd 100% accuraat.