Arikunto, Arikunto. 2006. Dasar-Dasar Evaluasi Pendidikan. Jakarta: Bumi Aksara. 
Arikunto, Suharsimi. 2013. Prosedur Penelitian suatu Pendekatan Praktik. Jakarta: Rineka Cipta.
H.M. Musfiqon. 2012. Pengembangan Media dan Sumber Pembelajaran. Jakarta: Prestasi Pustakaraya.
M. B. Etherington, " Investigative primary science: A problem-based learning approach". Australian Journal of Teacher Education (Online), vol,36,no.9, pp.53-74, 2011.
Sugiyono. 2019. Metode Penelitian & Pengembangan (Research and Development). Bandung: Alfabeta.
Thiagarajan, S., Semmel, D. S & Semmel, M. I. 1974. Instructional Development for
Training Teachers of Exceptional Children. Minneapolis, Minnesota: Leadership
Training Institute/Special Education, University of Minnesota.