(of)Henderson, J. B. (1920). A monograph of the east American scaphopod mollusks. <em>United States National Museum Bulletin.</em> 111(20): 1-177., available online athttp://www.biodiversitylibrary.org/item/33255 page(s): 107-108, pl. 17 fig. 10 [details]
MolluscaBase eds. (2024). MolluscaBase. Gadila elephas (J. B. Henderson, 1920). Accessed through: Land J. van der (ed). (2008) UNESCO-IOC Register of Marine Organisms (URMO) at: https://www.marinespecies.org/Urmo/aphia.php?p=taxdetails&id=344345 on 2024-07-04
Land J. van der (ed). (2008). UNESCO-IOC Register of Marine Organisms (URMO). Gadila elephas (J. B. Henderson, 1920). Accessed at: https://marinespecies.org/urmo/aphia.php?p=taxdetails&id=344345 on 2024-07-04
original description(of)Henderson, J. B. (1920). A monograph of the east American scaphopod mollusks. <em>United States National Museum Bulletin.</em> 111(20): 1-177., available online athttp://www.biodiversitylibrary.org/item/33255 page(s): 107-108, pl. 17 fig. 10 [details]