Kean, H. The moment of Greyfriars Bobby: The changing cultural position of animals, 1800-1920 / Hilda Kean. A cultural history of animals in the age of empire.(2007).
Lua i Stíl Chicago (17ú heag.)Kean, Hilda. "The Moment of Greyfriars Bobby: The Changing Cultural Position of Animals, 1800-1920 / Hilda Kean." A Cultural History of Animals in the Age of Empire.(2007) .
Lua MLA (8ú heag.)Kean, Hilda. "The Moment of Greyfriars Bobby: The Changing Cultural Position of Animals, 1800-1920 / Hilda Kean." A Cultural History of Animals in the Age of Empire.(2007), .
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