Cofnodi Dyfyniadau
Dyfyniad APA
Strawn, D., Bohn, H. L., & O'Connor, G. A. (2015). Soil chemistry (Fourth edition.). John Wiley & Sons, Limited.
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Dyfyniad Arddull Chicago
Strawn, Daniel, Hinrich L. Bohn, and George A. O'Connor. Soil Chemistry. Fourth edition. Chichester, West Sussex: John Wiley & Sons, Limited, 2015.
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Dyfyniad MLA
Strawn, Daniel, et al. Soil Chemistry. Fourth edition. John Wiley & Sons, Limited, 2015.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.