แหล่งที่มา WikiPedia: Gentiana http://www.forest.go.kr/kna/special/download/Engli... http://www.theplantlist.org/tpl1.1/search?q=gentia... https://archive.org/details/westerngardenboo00suns https://archive.org/details/westerngardenboo00suns... https://web.archive.org/web/20170525105020/http://... https://th.wikisource.org/wiki/en:The_Encyclopedia...
