SpringerLink (Online service), Van Zyl, L. E., & Rothmann Sr., S. (2019). Positive Psychological Intervention Design and Protocols for Multi-Cultural Contexts (1st ed. 2019.). Springer International Publishing : Imprint: Springer. https://doi.org/10.1007/978-3-030-20020-6

SpringerLink (Online service), Llewellyn Ellardus Van Zyl, and Sebastiaan Rothmann Sr. Positive Psychological Intervention Design and Protocols for Multi-Cultural Contexts. 1st ed. 2019. Cham: Springer International Publishing : Imprint: Springer, 2019. https://doi.org/10.1007/978-3-030-20020-6.

SpringerLink (Online service), et al. Positive Psychological Intervention Design and Protocols for Multi-Cultural Contexts. 1st ed. 2019. Springer International Publishing : Imprint: Springer, 2019. https://doi.org/10.1007/978-3-030-20020-6.