Παραπομπή σε μορφή APA (7η εκδ.)

SpringerLink (Online service) & Kostoulas, A. (2019). Challenging Boundaries in Language Education (1st ed. 2019.). Springer International Publishing : Imprint: Springer. https://doi.org/10.1007/978-3-030-17057-8

Παραπομπή σε μορφή Chicago (17η εκδ.)

SpringerLink (Online service) και Achilleas Kostoulas. Challenging Boundaries in Language Education. 1st ed. 2019. Cham: Springer International Publishing : Imprint: Springer, 2019. https://doi.org/10.1007/978-3-030-17057-8.

Παραπομπή σε μορφή MLA (8th εκδ.)

SpringerLink (Online service) και Achilleas Kostoulas. Challenging Boundaries in Language Education. 1st ed. 2019. Springer International Publishing : Imprint: Springer, 2019. https://doi.org/10.1007/978-3-030-17057-8.