Pangastuti, Ratna, et al. “Development of Learn to Think (LTT) Model Based on Integrated Twin Tower (ITT) to Increase Scientific and Spiritual Creativity of Students in the Early Childhood Islamic Education”. Prisma Sains : Jurnal Pengkajian Ilmu Dan Pembelajaran Matematika Dan IPA IKIP Mataram, vol. 10, no. 2, Mar. 2022, pp. 278-86, doi:10.33394/j-ps.v10i2.4904.