MLA

Cavalleriis, Giovanni Battista, 1525-1597. Pontificvm romanorvm effigies ... : Opera et studio, Ioa?nis Baptistae de Cauallerijs collectae ac typis aeneis incisae.. 1585. https://collections.library.yale.edu/catalog/10186433.

APA, 6th edition

Cavalleriis, Giovanni Battista, 1525-1597. (1585)[Pontificvm romanorvm effigies ... : Opera et studio, Ioa?nis Baptistae de Cauallerijs collectae ac typis aeneis incisae.]. https://collections.library.yale.edu/catalog/10186433.