Campbell, B. (1979). Birdwatcher at large. JU. M. Dent and Sos, Ltd.
Lua i Stíl Chicago (17ú heag.)Campbell, Bruce. Birdwatcher at Large. London: JU. M. Dent and Sos, Ltd, 1979.
Lua MLA (9ú heag.)Campbell, Bruce. Birdwatcher at Large. JU. M. Dent and Sos, Ltd, 1979.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.