Smith, E. A. (1896). On a collection of land-shells from Celebes. <em>Proceedings of the Malacological Society of London.</em> 2: 94–103., available online athttps://biodiversitylibrary.org/page/15036500 page(s): 100, pl. 7, fig. 27. [details]
MolluscaBase eds. (2021). MolluscaBase. Clausilia usitata E. A. Smith, 1896. Accessed at: https://www.molluscabase.org/aphia.php?p=taxdetails&id=1354124 on 2024-03-28
original descriptionSmith, E. A. (1896). On a collection of land-shells from Celebes. <em>Proceedings of the Malacological Society of London.</em> 2: 94–103., available online athttps://biodiversitylibrary.org/page/15036500 page(s): 100, pl. 7, fig. 27. [details]