Dyfyniad APA

Franceschi, S., Parazzini, F., Negri, E., Booth, M., La Vecchia, C., Beral, V., . . . Trichopoulos, D. (1991). Pooled analysis of 3 European case-control studies of epithelial ovarian cancer: III. Oral contraceptive use.

Dyfyniad Arddull Chicago

Franceschi, S., F. Parazzini, E. Negri, M. Booth, C. La Vecchia, V. Beral, A. Tzonou, and D. Trichopoulos. Pooled Analysis of 3 European Case-control Studies of Epithelial Ovarian Cancer: III. Oral Contraceptive Use. 1991.

Dyfyniad MLA

Franceschi, S., et al. Pooled Analysis of 3 European Case-control Studies of Epithelial Ovarian Cancer: III. Oral Contraceptive Use. 1991.

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