Dyfyniad APA
ebrary, Inc, & Madronová, L. (2011). Humic acids from raw materials of the Czech Republic. Nova Science Publishers.
Dyfyniad Arddull Chicago
ebrary, Inc, and Libuše Madronová. Humic Acids from Raw Materials of the Czech Republic. New York: Nova Science Publishers, 2011.
Dyfyniad MLA
ebrary, Inc, and Libuše Madronová. Humic Acids from Raw Materials of the Czech Republic. Nova Science Publishers, 2011.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.