Battista, L., & Rubble, V. (2014, January 13). Nine strategies to spark adult students intrinsic motivation. Faculty Focus.

Hyland, T.  (2014). Reconstructing vocational education and training for the 21st century: Mindfulness, craft, and values.  SAGE Open, January-March, 1–15.

Merriam, S., & Bierema, L.  (2013). Adult learning: Bridging theory and practice ( ed.).  San Francisco: Jossey Bass.

Sogunro, O. A.  (2015). Motivating factors for adult learners in higher education.  International Journal of Higher Education, 4(1), 22-37.