Não informado. (2016). Bi-Monthly Research Notes. Canadian Forestry Service, Department of Environment.
Lua i Stíl Chicago (17ú heag.)Não informado. Bi-Monthly Research Notes. Ottawa: Canadian Forestry Service, Department of Environment, 2016.
Lua MLA (8ú heag.)Não informado. Bi-Monthly Research Notes. Canadian Forestry Service, Department of Environment, 2016.
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