APA-ийн эшлэл(7 дахь хэвлэлт)
International Union of Soil Sciences, Soil Science Society of America, ebrary, Inc, World Congress of Soil Science, & Warkentin, B. P. (2006). Footprints in the soil: People and ideas in soil history. Elsevier.
Чикаго-гийн эшлэл (17 дахь хэвлэлт)
International Union of Soil Sciences, Soil Science Society of America, Inc ebrary, World Congress of Soil Science, ба Benno P. Warkentin. Footprints in the Soil: People and Ideas in Soil History. Amsterdam ; Boston: Elsevier, 2006.
MLA -ийн эшлэл (9 дэх хэвлэлт)
International Union of Soil Sciences, et al. Footprints in the Soil: People and Ideas in Soil History. Elsevier, 2006.
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