Não informado. (1957). Acta agriculturae scandinavica. Royal Swedish Academy of Agricultute and Forestry.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Acta Agriculturae Scandinavica. Stockholm: Royal Swedish Academy of Agricultute and Forestry, 1957.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Acta Agriculturae Scandinavica. Royal Swedish Academy of Agricultute and Forestry, 1957.
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