APA (7e ed.) Bronvermelding

(1988). Vitamin A supplemnsts Aguide to their use in the treatment and prevention of vitamin A deficiency and xerophthalmia <i>en</i>.

Chicago (17e ed.) Bronvermelding

Vitamin A Supplemnsts Aguide to Their Use in the Treatment and Prevention of Vitamin A Deficiency and Xerophthalmia <i>en</i>. 1988.

MLA (9e ed.) Bronvermelding

Vitamin A Supplemnsts Aguide to Their Use in the Treatment and Prevention of Vitamin A Deficiency and Xerophthalmia <i>en</i>. 1988.