MLA

More, Thomas, Saint, 1478-1535. Libellus vere aureus nec minus salutaris quam festiuus de optimo reip. statu, deq[ue] noua insula Vtopia. 1516]. https://collections.library.yale.edu/catalog/32187823.

APA, 6th edition

More, Thomas, Saint, 1478-1535. (1516])[Libellus vere aureus nec minus salutaris quam festiuus de optimo reip. statu, deq[ue] noua insula Vtopia]. https://collections.library.yale.edu/catalog/32187823.