APA

McKnight K. K., Wellons M. F., Sites C. K., Roth D. L., Szychowski J. M., Halanych J. H., Cushman M. & Safford M. M. (20111230). Racial and regional differences in age at menopause in the United States: findings from the REasons for Geographic And Racial Differences in Stroke (REGARDS) study. : American journal of obstetrics and gynecology.

Chicago

McKnight Katherine K, Wellons Melissa F, Sites Cynthia K, Roth David L, Szychowski Jeff M, Halanych Jewell H, Cushman Mary and Safford Monika M. 20111230. Racial and regional differences in age at menopause in the United States: findings from the REasons for Geographic And Racial Differences in Stroke (REGARDS) study. : American journal of obstetrics and gynecology.

Harvard

McKnight K. K., Wellons M. F., Sites C. K., Roth D. L., Szychowski J. M., Halanych J. H., Cushman M. and Safford M. M. (20111230). Racial and regional differences in age at menopause in the United States: findings from the REasons for Geographic And Racial Differences in Stroke (REGARDS) study. : American journal of obstetrics and gynecology.

MLA

McKnight Katherine K, Wellons Melissa F, Sites Cynthia K, Roth David L, Szychowski Jeff M, Halanych Jewell H, Cushman Mary and Safford Monika M. Racial and regional differences in age at menopause in the United States: findings from the REasons for Geographic And Racial Differences in Stroke (REGARDS) study. : American journal of obstetrics and gynecology. 20111230.