Conrad, T. A. (1849). Descriptions of new fossil and Recent shells of the United States. <em>Journal of the Academy of Natural Sciences of Philadelphia.</em> (2) 1(4): 207-209., available online athttps://biodiversitylibrary.org/page/35780297 page(s): 208; note: as D. protracta[details]
MolluscaBase eds. (2024). MolluscaBase. Donax protractus Conrad, 1849. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=1575033 on 2024-05-06
original descriptionConrad, T. A. (1849). Descriptions of new fossil and Recent shells of the United States. <em>Journal of the Academy of Natural Sciences of Philadelphia.</em> (2) 1(4): 207-209., available online athttps://biodiversitylibrary.org/page/35780297 page(s): 208; note: as D. protracta[details]