Loonen, M. J. J. E. (1997). Goose breeding ecology: Overcoming successive hurdles to raise goslings. Rijksuniversiteit te Groningen.
Lua i Stíl Chicago (17ú heag.)Loonen, Martinus Johannes Joachim Ewald. Goose Breeding Ecology: Overcoming Successive Hurdles to Raise Goslings. [Groningen]: Rijksuniversiteit te Groningen, 1997.
Lua MLA (8ú heag.)Loonen, Martinus Johannes Joachim Ewald. Goose Breeding Ecology: Overcoming Successive Hurdles to Raise Goslings. Rijksuniversiteit te Groningen, 1997.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.