Παραπομπή APA

Rosero Bixby, L., Grimaldo Vásquez, C., Rovira, E., Lee, N. C., Oberle, M. W., & Watley, A. S. (1987). A case-control study of breast cancer and hormonal contraception in Costa Rica.

Παραπομπή Chicago Style

Rosero Bixby, Luis, Carmen Grimaldo Vásquez, Elizabeth Rovira, Nancy C. Lee, Mark W. Oberle, και Anne S. Watley. A Case-control Study of Breast Cancer and Hormonal Contraception in Costa Rica. 1987.

Παραπομπή MLA

Rosero Bixby, Luis, et al. A Case-control Study of Breast Cancer and Hormonal Contraception in Costa Rica. 1987.

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