Tennyson, A & Brackenbury G. (1998). "Channel-billed Cuckoos in New Zealand in spring 1996". Notornis45: 223-226. [1]Arkivigite je 2008-10-17 per la retarkivo Wayback Machine
web.archive.org
Tennyson, A & Brackenbury G. (1998). "Channel-billed Cuckoos in New Zealand in spring 1996". Notornis45: 223-226. [1]Arkivigite je 2008-10-17 per la retarkivo Wayback Machine