Dyfyniad APA

(2000). Cole-parmer 2001/02. Vernon Hill, IL: Cole-Parmer instrument company.

Dyfyniad Arddull Chicago

Cole-parmer 2001/02. Vernon Hill, IL: Cole-Parmer instrument company, 2000.

Dyfyniad MLA

Cole-parmer 2001/02. Vernon Hill, IL: Cole-Parmer instrument company, 2000.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.