Biscaia et Guipuscoa, Cantabriae veteris pars.
MLA
Biscaia Et Guipuscoa, Cantabriae Veteris Pars. Blaeu, 1635. https://collections.library.yale.edu/catalog/15487334.
APA, 6th edition
Biscaia et Guipuscoa, Cantabriae veteris pars. (1635). [Maps]. Blaeu, https://collections.library.yale.edu/catalog/15487334.