Norton-Griffiths, M. (1968). The feeding behaviour of the oystercatcher, Haematopus ostralegus.
Lua i Stíl Chicago (17ú heag.)Norton-Griffiths, M. The Feeding Behaviour of the Oystercatcher, Haematopus Ostralegus. 1968.
Lua MLA (9ú heag.)Norton-Griffiths, M. The Feeding Behaviour of the Oystercatcher, Haematopus Ostralegus. 1968.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.