MLA

Sampson, Demetrios G, et al. Digital Systems for Open Access to Formal and Informal Learning. Springer International Publishing, 2014.

APA

Sampson, D. G, Ifenthaler, D., Isaias, P., & Spector, J. Michael. (2014). Digital Systems for Open Access to Formal and Informal Learning. Springer International Publishing.

Chicago

Sampson, Demetrios G., Dirk Ifenthaler, Pedro Isaias, and J. Michael Spector. Digital Systems for Open Access to Formal and Informal Learning. : Springer International Publishing, 2014.