Barlow, Jon C.; Leckie, Sheridan N. Pool, A. (บ.ก.). "Eurasian Tree Sparrow (Passer montanus)". The Birds of North America Online. Ithaca: Cornell Laboratory of Ornithology. สืบค้นเมื่อ 30 January 2009.{{cite web}}: CS1 maint: multiple names: authors list (ลิงก์)