SpringerLink (Online service), Green, M. W., Cowan, R., & Freitag, F. G. (2019). Chronic Headache: A Comprehensive Guide to Evaluation and Management (1st ed. 2019.). Springer International Publishing : Imprint: Springer. https://doi.org/10.1007/978-3-319-91491-6
Παραπομπή σε μορφή Chicago (17η εκδ.)SpringerLink (Online service), Mark W. Green, Robert Cowan, και Frederick G. Freitag. Chronic Headache: A Comprehensive Guide to Evaluation and Management. 1st ed. 2019. Cham: Springer International Publishing : Imprint: Springer, 2019. https://doi.org/10.1007/978-3-319-91491-6.
Παραπομπή σε μορφή MLA (8th εκδ.)SpringerLink (Online service), et al. Chronic Headache: A Comprehensive Guide to Evaluation and Management. 1st ed. 2019. Springer International Publishing : Imprint: Springer, 2019. https://doi.org/10.1007/978-3-319-91491-6.
