APA citiranje

Bubb, F. A. (1974). Letter: Vitamin A, pregnancy, and oral contraceptives.

Citação norma Chicago

Bubb, F A. Letter: Vitamin A, Pregnancy, and Oral Contraceptives. 1974.

MLA citiranje

Bubb, F A. Letter: Vitamin A, Pregnancy, and Oral Contraceptives. 1974.

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