Umiyah, Astik. “PERBEDAAN PENGUKURAN TAKSIRAN BERAT JANIN MENGGUNAKAN RUMUS JOHNSON TOHSACK DAN ULTRA SONO GRAFY”. Oksitosin : Jurnal Ilmiah Kebidanan 2, no. 2 (August 1, 2015): 80–87. Accessed March 4, 2026. https://journal.ibrahimy.ac.id/index.php/oksitosin/article/view/427.