Παραπομπή σε μορφή APA (7η εκδ.)

Spyreli, M., Σπυρέλη, Μ., & Grigoriou, P. (2022). Greek regions and governance: New challenges and organization of Air Navigation Services in the European area.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Spyreli, Maria, Μαρία Σπυρέλη, και Panagiotis Grigoriou. Greek Regions and Governance: New Challenges and Organization of Air Navigation Services in the European Area. 2022.

Παραπομπή σε μορφή MLA (9th εκδ.)

Spyreli, Maria, et al. Greek Regions and Governance: New Challenges and Organization of Air Navigation Services in the European Area. 2022.