Não informado. (2000). Technical communication. Commonwealth Bureau of Horticulture and Plantation Crops.
Lua i Stíl Chicago (17ú heag.)Não informado. Technical Communication. East Malling, Inglaterra: Commonwealth Bureau of Horticulture and Plantation Crops, 2000.
Lua MLA (8ú heag.)Não informado. Technical Communication. Commonwealth Bureau of Horticulture and Plantation Crops, 2000.
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