Prince Edward Island. no. 6 S.W. / Compiled and drawn by R.W. Ells... [et al.] ; Alfred R.C. Selwyn L.L.D., F.R.S. & director.
MLA
Ells, Robert Wheelock (1845-1911). Prince Edward Island. no. 6 S.W. / Compiled and drawn by R.W. Ells... [et al.] ; Alfred R.C. Selwyn L.L.D., F.R.S. & director.. BRBL_00376A. 1884. https://collections.library.yale.edu/catalog/15535430.
APA, 6th edition
Ells, Robert Wheelock (1845-1911). (["BRBL_00376A"])(1884)[Prince Edward Island. no. 6 S.W. / Compiled and drawn by R.W. Ells... [et al.] ; Alfred R.C. Selwyn L.L.D., F.R.S. & director.]. https://collections.library.yale.edu/catalog/15535430.