http://repository.ump.ac.id/1182/3/BAB%20II_TRIANA%20ANGGRAEANI_FARMASI%2716.pdf
http://repository.um-palembang.ac.id/id/eprint/14744/2/702015024%20BAB2_SAMPAI_BAB%20TERAKHIR.pdf
http://perpustakaan.poltekkes-malang.ac.id/assets/file/kti/1401100106/BAB_2.pdf
https://repository.unsri.ac.id/25480/1/Penatlaksanaan_OMA_pada_anak.pdf