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Dyfyniad Arddull ChicagoKramer, Wolfgang, U. Schirmer, P. Jeschke, and M. Witschel. Modern Crop Protection Compounds. 2nd rev. and enlarg. ed. Weinheim: Wiley-VCH, 2012.
Dyfyniad MLAKramer, Wolfgang, et al. Modern Crop Protection Compounds. 2nd rev. and enlarg. ed. Wiley-VCH, 2012.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.