Crawford, R. D. (1990). Poultry breeding and genetics. Elsevier.
Lua i Stíl Chicago (17ú heag.)Crawford, R. D. Poultry Breeding and Genetics. Amsterdam: Elsevier, 1990.
Lua MLA (9ú heag.)Crawford, R. D. Poultry Breeding and Genetics. Elsevier, 1990.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.