Não informado. (2001). Scientific investigations. Scottish Home Department, Department of Agriculture and Fisheries.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Scientific Investigations. Edinburgh, Inglaterra: Scottish Home Department, Department of Agriculture and Fisheries, 2001.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Scientific Investigations. Scottish Home Department, Department of Agriculture and Fisheries, 2001.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.