Bibliography:

R. Huang et al. (2019). Introduction to Educational Technology Download Introduction to Educational Technology, pp. 3-31.
R. Huang et al. (2019). Linking Learning Objectives, Pedagogies, and Technologies Download Linking Learning Objectives, Pedagogies, and Technologies, FOCUS on Section 3.3, pp. 57-61.
Mayer, R. E. (2009). Multimedia learning (2nd ed.). New York: Cambridge University Press.

Relevant Article:

Hlynka, D., & Jacobsen, M. (2010). What is Educational Technology, anyway? A commentary on the new AECT definition of the field. Canadian Journal of Learning and Technology / La Revue Canadienne De l’Apprentissage Et De La Technologie, 35(2). https://doi.org/10.21432/t2n88p