Παραπομπή σε μορφή APA (7η εκδ.)

SpringerLink (Online service) & Hassan, F. A. (2002). Droughts, Food and Culture: Ecological Change and Food Security in Africa’s Later Prehistory. Springer US.

Παραπομπή σε μορφή Chicago (17η εκδ.)

SpringerLink (Online service) και Fekri A. Hassan. Droughts, Food and Culture: Ecological Change and Food Security in Africa’s Later Prehistory. Boston, MA: Springer US, 2002.

Παραπομπή σε μορφή MLA (8th εκδ.)

SpringerLink (Online service) και Fekri A. Hassan. Droughts, Food and Culture: Ecological Change and Food Security in Africa’s Later Prehistory. Springer US, 2002.