Of the variation of the cumpas [i.e. compass] of magneticall needle [illustration.]
MLA
Of the Variation of the Cumpas [I.e. Compass] of Magneticall Needle [Illustration.]. By T. East, for Richard Ballard, 1585. https://collections.library.yale.edu/catalog/2004668.
APA, 6th edition
Of the variation of the cumpas [i.e. compass] of magneticall needle [illustration.]. (1585). By T. East, for Richard Ballard. https://collections.library.yale.edu/catalog/2004668.