Παραπομπή σε μορφή APA (7η εκδ.)

Heltveit, T. (1967). Studies in English demostrative pronouns: A constribution to the history of English morphology. Universitetsforlaget.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Heltveit, Trygve. Studies in English Demostrative Pronouns: A Constribution to the History of English Morphology. [Oslo]: Universitetsforlaget, 1967.

Παραπομπή σε μορφή MLA (9th εκδ.)

Heltveit, Trygve. Studies in English Demostrative Pronouns: A Constribution to the History of English Morphology. Universitetsforlaget, 1967.