Dyfyniad APA

Group, P. B. C. C., Schoemaker, M., Nichols, H., Wright, L., Brook, M., Jones, M., . . . Swerdlow, A. (2018). Association of body mass index and age with subsequent breast cancer risk in premenopausal women. American Medical Association.

Dyfyniad Arddull Chicago

Group, Premenopausal Breast Cancer Collaborative, et al. Association of Body Mass Index and Age with Subsequent Breast Cancer Risk in Premenopausal Women. American Medical Association, 2018.

Dyfyniad MLA

Group, Premenopausal Breast Cancer Collaborative, et al. Association of Body Mass Index and Age with Subsequent Breast Cancer Risk in Premenopausal Women. American Medical Association, 2018.

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