TIM-6301: Principles of Cybersecurity-

Warsinske, J., Graff, M., Henry, K., Hoover, C., Malisow, B., Murphy, S., Oakes, C.P., Pajari, G., Parker, T.P., Seidl,D., & Vasquez, M. (2019). Domain 2- asset security. In The official (ISC) 2 guide to the CISSP CBK Reference (5th ed., pp. 131-198). Wiley.
Read Domain 2 – Asset Security, pages 131-198.

Alonge, C. Y., Arogundade, O. T., Adesemowo, K., Ibrahalu, F. T., Adeniran, O. J., & Mustapha, A. M. (2020). Information asset classification and labelling model using Fuzzy approach for effective security risk assessment. 2020 International Conference in Mathematics, Computer Engineering and Computer Science (ICMCECS), (pp. 1–7).
In this paper, the author discusses asset classification and labeling using the Fuzzy method.

Chekati, A., Riahi, M., & Moussa, F. (2020). Data classification in the internet of things for smart objects framework. 2020 International Conference on Software, Telecommunications and Computer Networks (SoftCOM) (pp. 1–6).
The author presents data classification from an IoT perspective and the challenges the environment presents.

Chavalit, V., & Hohler, L. (2020). Data protection in a GDPR World. Internal Auditor, 77(3),35–39.
In this paper, the author discusses data protection from a GDPR perspective, which brings another set of challenges.

Mike Chapple, James Michael Stewart, Darril Gibson, (ISC)2 CISSP Certified Information Systems Security Professional Official Study Guide, 9th Edition