MLA

Herberstein, Sigmund, Freiherr von, 1486-1566, author. Rerum Moscouiticarum comentarii : in hijs comentarijs sparsim contenta habebis candide lector .... 1549]. https://collections.library.yale.edu/catalog/33058139.

APA, 6th edition

Herberstein, Sigmund, Freiherr von, 1486-1566, author. (1549])[Rerum Moscouiticarum comentarii : in hijs comentarijs sparsim contenta habebis candide lector ...]. https://collections.library.yale.edu/catalog/33058139.