Dyfyniad APA

Tavani, A., Negri, E., Franceschi, S., Parazzini, F., & La Vecchia, C. (1993). Oral contraceptives and breast cancer in northern Italy. Final report from a case-control study. Nature Publishing Group.

Dyfyniad Arddull Chicago

Tavani, A., E. Negri, S. Franceschi, F. Parazzini, and C. La Vecchia. Oral Contraceptives and Breast Cancer in Northern Italy. Final Report From a Case-control Study. Nature Publishing Group, 1993.

Dyfyniad MLA

Tavani, A., et al. Oral Contraceptives and Breast Cancer in Northern Italy. Final Report From a Case-control Study. Nature Publishing Group, 1993.

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