1. http://bja.oxfordjournals.org/content/85/3/446.long

2. http://www.jurnalmedika.com/edisi-tahun-2013/edisi-no-05-vol-xxxix-2013/573-kegiatan/1271- optimalisasi-tata-laksana-perioperatif-hemofilia-a

https://books.google.co.id/books?id=qgdPlhd-lc0C&pg=PA81&lpg=PA81&dq=persiapan+pra+operasi+pasien+bedah+hal+81&source=bl&ots=YKTiXoohIK&sig=JqJS4hGH1L-Osdg12Vqs5pUgsFs&hl=id&sa=X&ei=EY0RVYW_LYXGuASau4HoBg&ved=0CBsQ6AEwAA#v=onepage&q=persiapan%20pra%20operasi%20pasien%20bedah%20hal%2081&f=false