(of)Gude G. K. (1905). Description of nine new species of helicoid land shells. <em>Journal of Malacology.</em> 12: 11-14., available online athttps://biodiversitylibrary.org/page/27793595 page(s): 11, pl. 3 figs 4a-b [details]
MolluscaBase eds. (2025). MolluscaBase. Orpiella cookensis (Gude, 1905). Accessed through: Marine Species Traits editorial board (2025) Marine Species Traits at: https://www.marinespecies.org/traits/aphia.php?p=taxdetails&id=1377123 on 2025-06-02
Marine Species Traits editorial board (2025). Marine Species Traits. Orpiella cookensis (Gude, 1905). Accessed at: https://www.marinespecies.org/traits/aphia.php?p=taxdetails&id=1377123 on 2025-06-02
original description(of)Gude G. K. (1905). Description of nine new species of helicoid land shells. <em>Journal of Malacology.</em> 12: 11-14., available online athttps://biodiversitylibrary.org/page/27793595 page(s): 11, pl. 3 figs 4a-b [details]