SpringerLink (Online service), Nyssen, J., Jacob, M., & Frankl, A. (2019). Geo-trekking in Ethiopia's Tropical Mountains: The Dogu'a Tembien District (1st ed. 2019.). Springer International Publishing : Imprint: Springer. https://doi.org/10.1007/978-3-030-04955-3
Παραπομπή σε μορφή Chicago (17η εκδ.)SpringerLink (Online service), Jan Nyssen, Miro Jacob, και Amaury Frankl. Geo-trekking in Ethiopia's Tropical Mountains: The Dogu'a Tembien District. 1st ed. 2019. Cham: Springer International Publishing : Imprint: Springer, 2019. https://doi.org/10.1007/978-3-030-04955-3.
Παραπομπή σε μορφή MLA (8th εκδ.)SpringerLink (Online service), et al. Geo-trekking in Ethiopia's Tropical Mountains: The Dogu'a Tembien District. 1st ed. 2019. Springer International Publishing : Imprint: Springer, 2019. https://doi.org/10.1007/978-3-030-04955-3.
