E, A. S. A. A. A. M. A. A. D. D. A. A. S. R. S. (2014). Infertile men older than 40 years are at higher risk of sperm DNA damage. Reproductive Biology and Endocrinology, 12(1), . https://doi.org/10.1186/1477-7827-12-103
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)E, Alshahrani S.; Agarwal A.; Assidi M.; Abuzenadah A.M.; Durairajanayagam D.; Ayaz A.; Sharma R.; Sabanegh. "Infertile Men Older than 40 Years Are at Higher Risk of Sperm DNA Damage." Reproductive Biology and Endocrinology 12, no. 1 (2014). https://doi.org/10.1186/1477-7827-12-103.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)E, Alshahrani S.; Agarwal A.; Assidi M.; Abuzenadah A.M.; Durairajanayagam D.; Ayaz A.; Sharma R.; Sabanegh. "Infertile Men Older than 40 Years Are at Higher Risk of Sperm DNA Damage." Reproductive Biology and Endocrinology, vol. 12, no. 1, 2014, https://doi.org/10.1186/1477-7827-12-103.