Παραπομπή σε μορφή APA (7η εκδ.)

Jurgens, J. D. (1971). The morphology of the nasal region of Amphibia and its bearing of the phylogeny of the group. [University of Stellenbosch, Zoological Institute].

Παραπομπή σε μορφή Chicago (17η εκδ.)

Jurgens, J. D. The Morphology of the Nasal Region of Amphibia and Its Bearing of the Phylogeny of the Group. Stellenbosch: [University of Stellenbosch, Zoological Institute], 1971.

Παραπομπή σε μορφή MLA (8th εκδ.)

Jurgens, J. D. The Morphology of the Nasal Region of Amphibia and Its Bearing of the Phylogeny of the Group. [University of Stellenbosch, Zoological Institute], 1971.