Nielsen, S. N., & Briann D. Fath and other. (2020). A New Ecology system perspective (second edition.). Elsevier.
Чикаго-гийн эшлэл (17 дахь хэвлэлт)Nielsen, Soren Nors, ба Briann D. Fath and other. A New Ecology System Perspective. second edition. united Kingdom: Elsevier, 2020.
MLA -ийн эшлэл (9 дэх хэвлэлт)Nielsen, Soren Nors, ба Briann D. Fath and other. A New Ecology System Perspective. second edition. Elsevier, 2020.