Hammarström, Harald; Forkel, Robert; Haspelmath, Martin; Bank, Sebastian (2023-07-10). "Glottolog 4.8 - Piemontese-Lombard". Glottolog. Leipzig: Max Planck Institute for Evolutionary Anthropology=. doi:10.5281/zenodo.7398962. Archived from the original on 2023-10-29. Retrieved 2023-10-29.
Hammarström, Harald; Forkel, Robert; Haspelmath, Martin; Bank, Sebastian (2023-07-10). "Glottolog 4.8 - Piemontese-Lombard". Glottolog. Leipzig: Max Planck Institute for Evolutionary Anthropology=. doi:10.5281/zenodo.7398962. Archived from the original on 2023-10-29. Retrieved 2023-10-29.
Nordhoff, Sebastian; Hammarström, Harald; Forkel, Robert; Haspelmath, Martin, eds. (2013). "Piedmontese". Glottolog 2.2. Leipzig: Max Planck Institute for Evolutionary Anthropology. {{cite book}}: Invalid |display-editors=4 (help)
Hammarström, Harald; Forkel, Robert; Haspelmath, Martin; Bank, Sebastian (2023-07-10). "Glottolog 4.8 - Piemontese-Lombard". Glottolog. Leipzig: Max Planck Institute for Evolutionary Anthropology=. doi:10.5281/zenodo.7398962. Archived from the original on 2023-10-29. Retrieved 2023-10-29.