The correct format for the complete citation in the reference list following the author-date system is:
Westermann, Mariët. 1996. A Worldly Art: The Dutch Republic 1585 – 1718. New Haven and London: Yale University Press.
This format follows the general guideline of listing the author’s last name first, followed by the first name, the publication year, the title in italics, and the place of publication along with the publisher.