Dyfyniad APA

G. Thompson, F. (2010). Four species of land snails from Costa Rica and Panama (Pulmonata: Spiraxidae).

Dyfyniad Arddull Chicago

G. Thompson, Fred. Four Species of Land Snails From Costa Rica and Panama (Pulmonata: Spiraxidae). 2010.

Dyfyniad MLA

G. Thompson, Fred. Four Species of Land Snails From Costa Rica and Panama (Pulmonata: Spiraxidae). 2010.

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