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Dyfyniad Arddull ChicagoALLANS JONES. Practical Skill in Biology. Edinburgh Gate, England: Addison Wesley Longman, 1998.
Dyfyniad MLAALLANS JONES. Practical Skill in Biology. Edinburgh Gate, England: Addison Wesley Longman, 1998.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.