Helge, E. W. & Kanstrup, I. L. (2002, 11. January). Bone density in female elite gymnasts: Impact of muscle strength and sex hormones. Zugriff unter http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11782664&dopt=Abstract
APA (7th ed.) CitationHelge, E. W., & Kanstrup, I. L. (2002). Bone density in female elite gymnasts: Impact of muscle strength and sex hormones. Medicine & Science in Sports & Exercise, 34(1), 174-180.
Chicago Style (17th ed.) CitationHelge, E. W., and I. L. Kanstrup. "Bone Density in Female Elite Gymnasts: Impact of Muscle Strength and Sex Hormones." Medicine & Science in Sports & Exercise 34, no. 1 (2002): 174-180.
MLA (9th ed.) CitationHelge, E. W., and I. L. Kanstrup. "Bone Density in Female Elite Gymnasts: Impact of Muscle Strength and Sex Hormones." Medicine & Science in Sports & Exercise, vol. 34, no. 1, 2002, pp. 174-180.