Intan Sari; Kristina Natalia br Naibaho; Ledyta Roulina Sihombing; Martha Samosir; Debi Novita Siregar. THE RELATIONSHIP OF KNOWLEDGE AND MOTHER’S ATTITUDES IN CARRYING OUT BABY SPA FOR BABIES AGED 6-12 MONTHS AT PMB SITI HAJAR MEDAN 2025. MEDALION 2025, 6, 448-454.