Healthline
https://www.healthline.com/health/mens-health/normal-sperm-count#treatment
Diakses pada 30 Maret 2020Nature.com
https://www.nature.com/articles/srep42336/tables/1
Diakses pada 30 Maret 2020Mayo Clinic
https://www.mayoclinic.org/diseases-conditions/low-sperm-count/expert-answers/home-sperm-test/faq-20057836
Diakses pada 30 Maret 2020Mayo Clinic
https://www.mayoclinic.org/diseases-conditions/low-sperm-count/expert-answers/home-sperm-test/faq-20057836
Diakses pada 30 Maret 2020