MLA

Cross, J. Il Mercurio Italico Communicating a Voyage through Italy in the Yeares 1646 & 1647 by I.R. Gent. 1648. https://collections.library.yale.edu/catalog/2038258.

APA, 6th edition

Cross, J. (1648). Il Mercurio italico communicating a voyage through Italy in the yeares 1646 & 1647 by I.R. Gent [Engravings, Frontispieces (Illustrations), Title pages]. https://collections.library.yale.edu/catalog/2038258.