Siregar, E. S., and M. Mawaddah. “The Relationship Between Pregnancy Exercise And Quality Of Sleep For Pregnant Women In Trimester III At The Juliana Dalimunthe Clinic, Percut Sei Tuan Sub-District, Deli Serdang District, 2022”. Jurnal EduHealth, vol. 13, no. 02, Dec. 2022, pp. 971-6, https://ejournal.seaninstitute.or.id/index.php/healt/article/view/1028.