Παραπομπή σε μορφή APA (7η εκδ.)

Williams, F. M. (2016). Understanding Ethiopia: Geology and Scenery (1st ed. 2016.). Springer International Publishing : Imprint: Springer.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Williams, Frances M. Understanding Ethiopia: Geology and Scenery. 1st ed. 2016. Cham: Springer International Publishing : Imprint: Springer, 2016.

Παραπομπή σε μορφή MLA (8th εκδ.)

Williams, Frances M. Understanding Ethiopia: Geology and Scenery. 1st ed. 2016. Springer International Publishing : Imprint: Springer, 2016.