Various; Higley, W. K. Birds and Nature Vol. 11 No. 3 [March 1902] Illustrated by Color Photography.
Chicago-referens (17:e uppl.)Various; Higley, William Kerr. Birds and Nature Vol. 11 No. 3 [March 1902] Illustrated by Color Photography.
MLA-referens (9:e uppl.)Various; Higley, William Kerr. Birds and Nature Vol. 11 No. 3 [March 1902] Illustrated by Color Photography.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.