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Lua i Stíl Chicago (17ú heag.)Johansen, Inger, agus Leif Ryyarden. Wood-inhabiting Fungi (Aphyllophorales, Homobasidiomycetes) in Two Norwegian Forest Reserves =: Vedboende Sopp (Aphyllophorales, Homobasidiomycetes) I to Norske Skogreservater. Ås [Norway]: Norsk institutt for skogforskning, 1977.
Lua MLA (8ú heag.)Johansen, Inger, agus Leif Ryyarden. Wood-inhabiting Fungi (Aphyllophorales, Homobasidiomycetes) in Two Norwegian Forest Reserves =: Vedboende Sopp (Aphyllophorales, Homobasidiomycetes) I to Norske Skogreservater. Norsk institutt for skogforskning, 1977.