APA

Barnett C. M., Nielson C. M., Shannon J., Chan J. M., Shikany J. M., Bauer D. C., Hoffman A. R., Barrett-Connor E., Orwoll E. & Beer T. M. (20101101). Serum 25-OH vitamin D levels and risk of developing prostate cancer in older men. : Cancer causes & control : CCC.

Chicago

Barnett Christine M, Nielson Carrie M, Shannon Jackie, Chan June M, Shikany James M, Bauer Douglas C, Hoffman Andrew R, Barrett-Connor Elizabeth, Orwoll Eric and Beer Tomasz M. 20101101. Serum 25-OH vitamin D levels and risk of developing prostate cancer in older men. : Cancer causes & control : CCC.

Harvard

Barnett C. M., Nielson C. M., Shannon J., Chan J. M., Shikany J. M., Bauer D. C., Hoffman A. R., Barrett-Connor E., Orwoll E. and Beer T. M. (20101101). Serum 25-OH vitamin D levels and risk of developing prostate cancer in older men. : Cancer causes & control : CCC.

MLA

Barnett Christine M, Nielson Carrie M, Shannon Jackie, Chan June M, Shikany James M, Bauer Douglas C, Hoffman Andrew R, Barrett-Connor Elizabeth, Orwoll Eric and Beer Tomasz M. Serum 25-OH vitamin D levels and risk of developing prostate cancer in older men. : Cancer causes & control : CCC. 20101101.