Παραπομπή σε μορφή APA (7η εκδ.)

Thom, T. J. (1997). The relationship between the distribution of otter (Lutra lutra, L.) signs and habitat in the upper Tyne river catchment, NE England.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Thom, Timothy James. The Relationship Between the Distribution of Otter (Lutra Lutra, L.) Signs and Habitat in the Upper Tyne River Catchment, NE England. 1997.

Παραπομπή σε μορφή MLA (8th εκδ.)

Thom, Timothy James. The Relationship Between the Distribution of Otter (Lutra Lutra, L.) Signs and Habitat in the Upper Tyne River Catchment, NE England. 1997.