MLA

Homann Erben (Firm), Muller, J. C. (Johann Christoph), 1673-1721. Bohemiae Regnum in XII Circulos divisum [cartographic material] : cum Com. Glac. et Distr. Egerano ceterisq[ue] circumjacentibiis terris / ex Muellerianis aliisq[ue] chorographicis subsidys delineatum nunc noviter revisum et emendatum per Homannianos Here. [ca. 1730?]. https://collections.library.yale.edu/catalog/2065577.

APA, 6th edition

Homann Erben (Firm), & Muller, J. C. (Johann Christoph), 1673-1721. ([ca. 1730?])[Bohemiae Regnum in XII Circulos divisum [cartographic material] : cum Com. Glac. et Distr. Egerano ceterisq[ue] circumjacentibiis terris / ex Muellerianis aliisq[ue] chorographicis subsidys delineatum nunc noviter revisum et emendatum per Homannianos Here]. https://collections.library.yale.edu/catalog/2065577.