Feldman, H. A., Longcope, C., Derby, C. A., Johannes, C. B., Araujo, A. B., Coviello, A. D., . . . McKinlay, J. B. (2002). Age Trends in the Level of Serum Testosterone and Other Hormones in Middle-Aged Men: Longitudinal Results from the Massachusetts Male Aging Study. The journal of clinical endocrinology and metabolism, 87(2), 589-598. https://doi.org/10.1210/jcem.87.2.8201
Chicago Style (17th ed.) CitationFeldman, Henry A., Christopher Longcope, Carol A. Derby, Catherine B. Johannes, Andre B. Araujo, Andrea D. Coviello, William J. Bremner, and John B. McKinlay. "Age Trends in the Level of Serum Testosterone and Other Hormones in Middle-Aged Men: Longitudinal Results from the Massachusetts Male Aging Study." The Journal of Clinical Endocrinology and Metabolism 87, no. 2 (2002): 589-598. https://doi.org/10.1210/jcem.87.2.8201.
MLA (9th ed.) CitationFeldman, Henry A., et al. "Age Trends in the Level of Serum Testosterone and Other Hormones in Middle-Aged Men: Longitudinal Results from the Massachusetts Male Aging Study." The Journal of Clinical Endocrinology and Metabolism, vol. 87, no. 2, 2002, pp. 589-598, https://doi.org/10.1210/jcem.87.2.8201.