http://kangcom.com/common/bookinfo/bookinfo.asp?sku=200802180001
http://www.kyobobook.co.kr/product/detailViewKor.laf?ejkGb=KOR&mallGb=KOR&barcode=9788935304219&orderClick=LAG
http://www.aladdin.co.kr/shop/wproduct.aspx?ISBN=8935304212
http://www.yes24.com/Goods/FTGoodsView.aspx?goodsNo=2837454&CategoryNumber=001001003016002002