Παραπομπή σε μορφή APA (7η εκδ.)

du Plessis, A. (2017). Freshwater Challenges of South Africa and its Upper Vaal River: Current State and Outlook. Springer International Publishing : Imprint: Springer.

Παραπομπή σε μορφή Chicago (17η εκδ.)

du Plessis, Anja. Freshwater Challenges of South Africa and Its Upper Vaal River: Current State and Outlook. Cham: Springer International Publishing : Imprint: Springer, 2017.

Παραπομπή σε μορφή MLA (8th εκδ.)

du Plessis, Anja. Freshwater Challenges of South Africa and Its Upper Vaal River: Current State and Outlook. Springer International Publishing : Imprint: Springer, 2017.