saputra R, Julianti N, Firmansyah A, Amir R, Dhana Rizkita A, Ayu Dewi S. Effect Of The Extraction Methods On The Identification Of Caffeine In The Extract Of Dragon Fruit Peel. ijcs [Internet]. 13Nov.2023 [cited 4Dec.2024];12(3):278-87. Available from: http://journal.unnes.ac.id/sju/ijcs/article/view/75304