Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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