Dyfyniad APA

Beral, V. (1997). Breast cancer and hormone replacement therapy: Collaborative reanalysis of data from 51 epidemiological studies of 52,705 women with breast cancer and 108,411 women without breast cancer. Collaborative Group on Hormonal Factors in Breast Cancer.

Dyfyniad Arddull Chicago

Beral, V. Breast Cancer and Hormone Replacement Therapy: Collaborative Reanalysis of Data from 51 Epidemiological Studies of 52,705 Women with Breast Cancer and 108,411 Women Without Breast Cancer. Collaborative Group on Hormonal Factors in Breast Cancer. 1997.

Dyfyniad MLA

Beral, V. Breast Cancer and Hormone Replacement Therapy: Collaborative Reanalysis of Data from 51 Epidemiological Studies of 52,705 Women with Breast Cancer and 108,411 Women Without Breast Cancer. Collaborative Group on Hormonal Factors in Breast Cancer. 1997.

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