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Dyfyniad Arddull ChicagoMichael G. Barbour ... [et al.]. Terrestrial Plant Ecology. Menlo Park, CA: Addison Wesley Longman, 1998.
Dyfyniad MLAMichael G. Barbour ... [et al.]. Terrestrial Plant Ecology. Menlo Park, CA: Addison Wesley Longman, 1998.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.