Raven, P. H. (2005). Biology (7th ed.). McGraw-Hill, Higher Education.
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Dyfyniad Arddull Chicago
Raven, Peter H. Biology. 7th ed. Boston: McGraw-Hill, Higher Education, 2005.
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Dyfyniad MLA
Raven, Peter H. Biology. 7th ed. McGraw-Hill, Higher Education, 2005.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.