Thien, S. J., & Graveel, J. G. (2003). Laboratory manual for soil science: Agricultural & enviromental principles (Eighth edition.). New York: McGraw-Hill.
Trích dẫn kiểu ChicagoThien, Stephen J., và John G. Graveel. Laboratory Manual for Soil Science: Agricultural & Enviromental Principles. Eighth edition. New York: McGraw-Hill, 2003.
MLA CitationThien, Stephen J., và John G. Graveel. Laboratory Manual for Soil Science: Agricultural & Enviromental Principles. Eighth edition. New York: McGraw-Hill, 2003.
Advarsel: Disse citationer er muligvist ikke 100% nøjagtige.