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Dyfyniad Arddull ChicagoSharm, O. P. Plant Texonomy. New Delhi: McGraw Hill Education, 2009.
Dyfyniad MLASharm, O. P. Plant Texonomy. McGraw Hill Education, 2009.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.