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Citação do estilo Chicago (17ª ed.)British Society of Animal Science. Animal Science. Penicuik, Inglaterra: Durrant Periodicals, 1995.
Citação MLA (8ª ed.)British Society of Animal Science. Animal Science. Durrant Periodicals, 1995.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.