Austin, O. L. (1968). Life histories of North American cardinals, grosbeaks, buntings, towhees, finches, sparrows, and allies: Order passeriformes: family fringillidae. Smithsonian Inst. Press.
Chicago-Zitierstil (17. Ausg.)Austin, Oliver Luther. Life Histories of North American Cardinals, Grosbeaks, Buntings, Towhees, Finches, Sparrows, and Allies: Order Passeriformes: Family Fringillidae. Washington, DC: Smithsonian Inst. Press, 1968.
MLA-Zitierstil (9. Ausg.)Austin, Oliver Luther. Life Histories of North American Cardinals, Grosbeaks, Buntings, Towhees, Finches, Sparrows, and Allies: Order Passeriformes: Family Fringillidae. Smithsonian Inst. Press, 1968.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.