Fadilah, N., and N. Efendi. “Student Pleasure Attitude and Interest in Spending Time Learning Science Against Student Cognitive Learning Outcomes: Sikap Senang Siswa Dan Minat Meluangkan Waktu Belajar IPA Terhadap Hasil Belajar Kognitif Siswa”. Academia Open, vol. 3, Sept. 2020, p. 10.21070/acopen.3.2020.497, doi:10.21070/acopen.3.2020.497.