Παραπομπή σε μορφή APA (7η εκδ.)

Enstad, G. G. (1981). A novel theory on the arching and doming in mass flow hoppers. Norges Teknisks Høgskole.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Enstad, Gisle G. A Novel Theory on the Arching and Doming in Mass Flow Hoppers. Bergen, Norway: Norges Teknisks Høgskole, 1981.

Παραπομπή σε μορφή MLA (8th εκδ.)

Enstad, Gisle G. A Novel Theory on the Arching and Doming in Mass Flow Hoppers. Norges Teknisks Høgskole, 1981.