APA (7th ed.) Citation

Key, T., Appleby, P., Reeves, G., Roddam, A., Dorgan, J., Longcope, C., . . . Krogh, A. (2003). Free estradiol and breast cancer risk in postmenopausal women: Comparison of measured and calculated values.

Chicago Style (17th ed.) Citation

Key, T., et al. Free Estradiol and Breast Cancer Risk in Postmenopausal Women: Comparison of Measured and Calculated Values. 2003.

MLA (9th ed.) Citation

Key, T., et al. Free Estradiol and Breast Cancer Risk in Postmenopausal Women: Comparison of Measured and Calculated Values. 2003.

Warning: These citations may not always be 100% accurate.