Eka Wahyuningsih, Mirotin. “Perfectionism in ‘Perfect Slumber Party’, a Soundtrack of Sofia the First: The Big Sleepover”. NOBEL: Journal of Literature and Language Teaching 12, no. 1 (April 30, 2021): 29-42. Accessed October 21, 2021. http://jurnalfahum.uinsby.ac.id/index.php/nobel/article/view/350.