Sharkins Kimberly, N. A. (2017). Flipping theory: Ways in which children's experiences in the 21st century classroom can provide insight into the theories of Piaget and Vygotsky. Universiti Pendidikan Sultan Idris.

Sharkins Kimberly, Newton Allison. Flipping Theory: Ways in Which Children's Experiences in the 21st Century Classroom Can Provide Insight Into the Theories of Piaget and Vygotsky. Universiti Pendidikan Sultan Idris, 2017.

Sharkins Kimberly, Newton Allison. Flipping Theory: Ways in Which Children's Experiences in the 21st Century Classroom Can Provide Insight Into the Theories of Piaget and Vygotsky. Universiti Pendidikan Sultan Idris, 2017.