Παραπομπή σε μορφή APA (7η εκδ.)

Langdon, J. (2002). Horses, oxen and technological innovation: The use of draught animals in English farming from 1066 to 1500. Cambridge University Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Langdon, John. Horses, Oxen and Technological Innovation: The Use of Draught Animals in English Farming from 1066 to 1500. Cambridge: Cambridge University Press, 2002.

Παραπομπή σε μορφή MLA (9th εκδ.)

Langdon, John. Horses, Oxen and Technological Innovation: The Use of Draught Animals in English Farming from 1066 to 1500. Cambridge University Press, 2002.