Cita APA

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

Citación estilo Chicago

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

Cita MLA

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