SpringerLink (Online service), Coetzee, M., Potgieter, I. L., & Ferreira, N. (2018). Psychology of Retention: Theory, Research and Practice (1st ed. 2018.). Springer International Publishing : Imprint: Springer. https://doi.org/10.1007/978-3-319-98920-4
Παραπομπή σε μορφή Chicago (17η εκδ.)SpringerLink (Online service), Melinde Coetzee, Ingrid L. Potgieter, και Nadia Ferreira. Psychology of Retention: Theory, Research and Practice. 1st ed. 2018. Cham: Springer International Publishing : Imprint: Springer, 2018. https://doi.org/10.1007/978-3-319-98920-4.
Παραπομπή σε μορφή MLA (8th εκδ.)SpringerLink (Online service), et al. Psychology of Retention: Theory, Research and Practice. 1st ed. 2018. Springer International Publishing : Imprint: Springer, 2018. https://doi.org/10.1007/978-3-319-98920-4.
