Thorpe, E. (2009). The person general knowledge manual 2009. Dorling Kindersley.
Lua i Stíl Chicago (17ú heag.)Thorpe, Edgas. The Person General Knowledge Manual 2009. New Delhi: Dorling Kindersley, 2009.
Lua MLA (9ú heag.)Thorpe, Edgas. The Person General Knowledge Manual 2009. Dorling Kindersley, 2009.
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