APA-ийн эшлэл(7 дахь хэвлэлт)
Humic Substances Seminar Northeastern University, Royal Society of Chemistry (Great Britain), ebrary, Inc, Ghabbour, E. A., & Davies, G. (2001). Humic substances: Structures, models and functions. Royal Society of Chemistry.
Чикаго-гийн эшлэл (17 дахь хэвлэлт)
Humic Substances Seminar Northeastern University, Royal Society of Chemistry (Great Britain), Inc ebrary, Elham A. Ghabbour, ба Geoffrey Davies. Humic Substances: Structures, Models and Functions. Cambridge: Royal Society of Chemistry, 2001.
MLA -ийн эшлэл (9 дэх хэвлэлт)
Humic Substances Seminar Northeastern University, et al. Humic Substances: Structures, Models and Functions. Royal Society of Chemistry, 2001.
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