Παραπομπή σε μορφή APA (7η εκδ.)

Gelting, P. (1937). Studies on the food of the east Greenland ptarmigan: Especially in its relation to vegetation and snow-cover. C.A. Reitzel.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Gelting, Paul. Studies on the Food of the East Greenland Ptarmigan: Especially in Its Relation to Vegetation and Snow-cover. København: C.A. Reitzel, 1937.

Παραπομπή σε μορφή MLA (8th εκδ.)

Gelting, Paul. Studies on the Food of the East Greenland Ptarmigan: Especially in Its Relation to Vegetation and Snow-cover. C.A. Reitzel, 1937.