APA (7 ম সংস্করণ) উদ্ধৃতি

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

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

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.

M.L.A (8 ম সংস্করণ) উদ্ধৃতি

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