Medical News Today. https://www.medicalnewstoday.com/articles/322399
Diakses pada 24 Oktober 2020Healthline. https://www.healthline.com/health/pregnancy/signs-of-having-a-boy
Diakses pada 24 Oktober 2020WebMD. https://www.webmd.com/baby/features/predicting-baby-gender
Diakses pada 24 Oktober 2020