MLA

Blaeu, Willem Janszoon, 1571-1638, Cluver, Philipp, 1580-1622, Symons, Evert van Hamersveldt, engraver. Alpinae seu Foederatae Rhaetiae : subditarumque ei terrarum nova descriptio / auctoribus Fortunato Sprechero a Berneck Eq., aur. & I.V.D. Ret. Ac Phil. Cluverio ; Evert Sijmons z Hamers veldt sculp. [ca. 1630]. https://collections.library.yale.edu/catalog/2111097.

APA, 6th edition

Blaeu, Willem Janszoon, 1571-1638, & Cluver, Philipp, 1580-1622, & Symons, Evert van Hamersveldt, engraver. ([ca. 1630])[Alpinae seu Foederatae Rhaetiae : subditarumque ei terrarum nova descriptio / auctoribus Fortunato Sprechero a Berneck Eq., aur. & I.V.D. Ret. Ac Phil. Cluverio ; Evert Sijmons z Hamers veldt sculp]. https://collections.library.yale.edu/catalog/2111097.