Butcher, G. D., & Miles, R. (2002). Infectious bronchitis and its effect on egg production and egg quality. MARID Agribusiness Digest.
Lua i Stíl Chicago (17ú heag.)Butcher, Gary D., agus Richard Miles. "Infectious Bronchitis and Its Effect on Egg Production and Egg Quality." MARID Agribusiness Digest 2002.
Lua MLA (9ú heag.)Butcher, Gary D., agus Richard Miles. "Infectious Bronchitis and Its Effect on Egg Production and Egg Quality." MARID Agribusiness Digest, 2002.
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