Dyfyniad APA

Abbott, R. (1989). Compendium of landshellsa color guide to more than 2,000 of the worlds terrestrial shellsR.Tucker Abbott. American Malacologists.

Dyfyniad Arddull Chicago

Abbott, R.Tucker. Compendium of Landshellsa Color Guide to More than 2,000 of the Worlds Terrestrial ShellsR.Tucker Abbott. American Malacologists, 1989.

Dyfyniad MLA

Abbott, R.Tucker. Compendium of Landshellsa Color Guide to More than 2,000 of the Worlds Terrestrial ShellsR.Tucker Abbott. American Malacologists, 1989.

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