APA (7e ed.) Bronvermelding
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.
Chicago (17e ed.) Bronvermelding
International Union of Soil Sciences, Soil Science Society of America, Inc ebrary, World Congress of Soil Science, en Benno P. Warkentin. Footprints in the Soil: People and Ideas in Soil History. Amsterdam ; Boston: Elsevier, 2006.
MLA (9e ed.) Bronvermelding
International Union of Soil Sciences, et al. Footprints in the Soil: People and Ideas in Soil History. Elsevier, 2006.
Let op: Deze citaties zijn niet altijd 100% accuraat.